MMO’s (or, anything that mainly an online game actually, I don’t even know what all those genres are called today, MOBA, GAAS, whatever)
Though everyone of those beside MMO has had it’s exceptions. Obviously there’s also some genres I’m more indifferent to, but I don’t really dislike those.
Also EA. Though that’s not a genre, I don’t like anything that bears the name of EA by default, because it bears the name of EA.