The "AI" is completely and utterly unfair. They get free resets, can push you off the track with ease and don't succumb to losing grip at all, which makes them directly better than you and honestly more a nuisance than a challenge.
If rewriting the "AI" to be better is out of your league, maybe you could just require players to beat a certain time rather than race against an opponent.
Also, the controls are whack and aren't explained whatsoever. Customizable keybinds will solve this, but it won't fix that the cars feeling like utter shit to drive and are borderline uncontrollable at times, making actual racing pointless.