I think I'm about ready to give up on Driveclub. I can't even come remotely close to winning any of the Hyper car races. They're just too hard to handle, ridiculously frustrating
I know there are a ton of games to jump to but all I will say is stick with it. I was where you are with GT5 and the damn Red Bull car. So difficult to control, but I would just do a race or two every day for a few weeks. I eventually got the hang of it and I think it made me better using every other car as well. There is such little room for error with the high-end cars, so once you can figure out the timing with braking, cornering, and acceleration, it flows down into the lower tiers.
One thing that really helped me with the hyper cars is to try to brake and accelerate in a straight line. Breaking while cornering almost always lead to it letting go, while accelerating while turning caused the car to go sideways pretty quick. This might not be the best strategy for setting lap times, but it should get you through most races.