Car physics in this game are slippery.
Even when it's dirt and you're using offroad vehicles.
Also adjust the physics a bit lower because you can't climb on SMALL hills, it's slowing down the car too much, and it's not even steep at all, that would not not happen in other games.
This issue stops me from completing time trials specifically if you're on a location where there's a lot of hills, and I can't progress.
Optimize the game as well.