The default control with gamepad is broken, because gas and brake are digital. On PC I mapped accelerate to up on the left analog stick, and brake to down on left analog stick. Now I can gently accelerate on bends (just like in real life) to maintain control, instead of decelerating. And there is absolutely no way to have this kind of finesse in acceleration/brake with KB+M as far as I can tell.
You won’t get this problem if you are playing with a wheel though.