Solved

I'm done

No matter how I develop the car I always have a good start and then after the 2 races I'm as slow as a McLaren don't even know why 

1.) Weakness of your CD shall not be in the big 4.
2.) How do u research? Research one at the time. Big 4 of course.
3.) How do u do dev upgrades? Big 4 first. Hopefully not on the part u are going to research.

Give more insight. Otherwise we won't be able to help.
Or is this just whining?

for me it looks like strategy. 
in 2 races you were Top, in 7 not.
in 3 of that 7 you had no setup and in 3 a bad strategy or tire choice. so just in spain i don't know. spain can be because of Research, Handling is absolutely important there if you had bad Handling stats, then that would be the reason.