Suggested

DRS is a joke!

You've got to something about DRS! It's deciding races in a way that simply doesn't happen F1. This is about the 5th time I've been way out front with the fastest car then two cars swapping drs just catch you up through no other reason than DRS! It almost makes it impossible to win a race by being out front and that's ridiculous and NEVER happens in F1. You've got to tone the drs advantage down, and others agree, it's making a mockery of the game. Pee'd off with it. My only option is too do nothing all through the race and then hold down the KERS button for the last lap. But what's the point, where's the skill in that? It really spoils the game and that's a real shame when you've invested hundreds of hours and plenty of money in it. Not happy.

Yh. DRS makes racing so bad.

This is shared through a lot of the players of this game and unfortunately the best way to win is just to sit there and do nothing until the last lap!!

Partly agreed, the drs should be slowed down in order to give the first a chance to make his race. But this already happens in some tracks, such as Brazil, Mexico, GB09, and others. While tracks such as Italy, Austria, Hungary, and some others, it is simply a train to wait for the last lap, considering the imbalance of the drs.

I agree too! 2 days ago it happened to me in Hungary. I was leading the race with a big gap to the 2nd..... but then suddenly the gap was away and I ended up at position 5/6...... maybe the solution is not slowing down drs but maybe increase „clean air driving“

That's a good idea, or only allow drs when your car is a second a lap faster than the car in front so when you overtake you pull away as you would most of the time in real life.

I would love it if they halved the impact of DRS and found some way of rationing the KERS.
Tracks like Austria, Italy and even Belgium are made or broken by pure luck.
Where as other tracks where the DRS isn’t so strong are actually very interesting, tactical races.
I know they have to encourage you to upgrade your HQ, but there has to be other ways of doing it

Altho people with maxed car and maxed boost would simply couldnt be overtaken/overtaking someone

Couldn't agree more with the OP. Your efforts for how you manage your team should be reflected over the average course of 5km rather than a mere 400 metres! Although I can understand from a development point of view that this is always going to be an issue within the game as long as drs trains exist. 
One of the main differences between real life F1 and this game is the difference in speed between the top teams all the way down. So if you consider the difference in speed between the top team in F1 compared to 5th, 6th, 7th, 8th, 9th or tenth you'll see it's considerably more than this game. That's why you generally don't see drs trains in real F1 because of the margins between the best, the great, the good and the back markers on the grid. It's not unusual to see a gap of maybe 8 tenths to a full second between 1st and 10th place drivers in real F1, whereas here it's quite normal to see the top ten, maybe 12 teams all within one tenth of a second between each other. 
So here is where the developers of the game will always struggle in their quest to break up drs trains in igp manager, simply because of team equality! In real F1 the leaders have an easier time pulling away from the chasing pack because drs is a lot more sporadic and also through speed differential. So take for example, if first place driver is half a second quicker than 5th place driver per lap (which is probably about average) and 5th place driver manages to be lucky enough to catch drs for 3 laps out of 5 laps, he will still be one second down from the leader over 5 laps if he managed to gain half a second in each of his 3 drs laps. That's where you can make a relatively big distinction between real F1 and the top ten-twelve teams in this game. 
At the same time though I do think a very feasible way to allow players to gain more satisfaction from a victory or a high place finish in this game is to tone down drs just enough to make those 5km gains for faster cars more effective than the mere 400 metres burst of speed you get through a drs zone! So the suggestion made by Malcolm gets a big thumbs up from me! 👍 
Another possible alternative would be to shorten the drs zones, this may work even more so than a tone down in drs speed potential because instead of limiting a cars ability to make the overtake in drs zones it would still allow for such overtakes but shortens the drs burst duration in a way that would neutralise the overwhelming gains made by drs chasers behind a leading player with a faster car. This would give any car that breaks away from the drs train the opportunity to remain ahead of the train resulting in some very interesting and possibly a lot more realistic racing at the front of the pack. This way the races would actually be decided by whoever is the strongest manager! 😁

Let's see if the "big update" from the developers fix some of these problems. 
And we can't demand this game to have similar racing as F1, because old managers are all having the same stats, so it's just 32 Mercedes with Hamilton, the only difference is the tactics

dirty air used to be more powerful in the past but the devs changed it and made it less powerfull for cars to overtake in normal parts of the track, same with DRS made more powerful, be much better to roll back the those changes from the past and roll back the tyre/push level changes of 2018 also, the live racing was way way better in 2012-2014 period with less drs, more dirty air no big drs trains except Monza and more effective push level changes.

100% agree!, Drs power is way too strong, it decides who wins

I guess Italy, Austria, Hungary...


But, on the other hand, DRS is too weak in tracks like Brazil, Monaco...

In my opinion based on my gaming experience, the tracks are grouped like this:

DRS-HIGH
Italy-Austria-Hungary

DRS-LOW
Australia-GB09-Brazil-Mexico-Azerbaijan

DRS-MEDIUM HIGH
Bahrain-Spain-Canada-France-Germany-Russia-USA-GB19

DRS-MEDIUM LOW
Malaysia-China-Belgium-Japan-Abu Dhabi-Monaco-Turkey-Singapore-Europe

High and Medium High, indicate the almost impossibility of taking advantage against the DRS, vice versa Low and Medium Low it is possible to try the solo escape.
This is my opinion, some may disagree, but honestly I have participated in championships where I was able to take advantage on tracks like Austria or Italy, so even the skills of the opponents, like your own skills, can mislead a few times.

drs boost and thrust functioning are among the few things that work in the game why change them?  there are many other priorities.  is the drs too powerful in Italy?  so what?  it's part of the game and the strategy you have to use to win.  I remind everyone that IGP cannot be compared to the real f1 otherwise the boost should be completely removed since it is against every law of physics.  but if you want to bury the game more you are free to do it.  mine is not a criticism but a personal consideration.

Thanks José

Spa is really bad to tbh, if you miss drs once then it’s pretty much race over in some leagues

The point being made is that as things stand it is very hard to break away from a DRS train even when sometimes by picking a better set up or strategy you have a faster car which obviously doesn't seem right and all it does is make everyone stop being creative and just all wait for the last lap and all hold down your boost button. Surely we want to encourage different strategies to make the races interesting and to reward the gambler occasionally? All we're saying is tone down the DRS a touch. 
P.S. The guy that says the best manager is always the winner is talking nonsense. At a recent Austria race I gambled and chose a completely different strategy to everyone else and was flying after 3 laps on the same tyres as my competitors, after about 10 laps I was miles ahead, there was no way I couldn't win. And then four cars started a DRS train and there was nothing I could do, I was a sitting duck and watched my lead being eaten away. Then it became a boost 'shootout' lottery and I came 4th! Can you imagine that happening to Lewis Hamilton with a 5 second lead? There would be uproar. If I sit in the DRS pack, dont get involved in the race, wait for the last lap, hit the boost button and win the race that does not make me the best manager. I just got lucky.

Hello! I have repeatedly written that KERS And DRS spoil the game. I suggested making it possible in the leagues to disable these systems. There are leagues in which most players do not want to use KERS. My league is one of them. We have an unspoken rule not to use KERS for the entire distance. And we like this rule. But the sad thing is that the race is constantly running DRS, which breaks the strategy of the players. For example, start on a heavier car. My suggestion was to allow the league host in the settings to be able to activate/deactivate for all KERS and DRS players. Or make switches for each league division. Beginners, professionals, and the elite. With the introduction of these switches, many players ' interest in the game would be renewed. Because there would be a flight for imagination in the rules.