So Rocket League doesn't exist and cars can fly.
Anyways, my least favorite genre definitely has to be JRPGs. Their stories are mostly copy-paste to the point of being tropes, they are grindy to an extreme, they don't offer much in terms of worthwhile character interactions and worst of all, the twists can be seen from a mile away. Action RPGs have somewhat negated this by putting more emphasis on skill in battles though, so I guess I can forgive them