Suggested

Improved league filter.

You should be able to set the filter to select only the important things.

Tire change, refueling, speed, race length, how many cars per team participate and from which country the league comes.

At the moment this is not possible because you have to select the time and on which days a race takes place.

I imagine that all the important information is displayed (the ones I mentioned above) and then you can choose which ones are important and fill them in accordingly. So you can search a league exactly according to your preferences.

You can already choose your preference on how many cars you want to manage but I agree with the rest of these

The problem is that I MUST choose at what time the races take place and on how many days a week. There is no possibility to select a league according to the nations.

It should be possible to set the filter to search only for a specific country, number of cars, race length/speed and refueling/tire change. Or for example only leagues in a certain country.  

And also to add on maybe a filter for host and league ratings