Don’t waste your time going back and forth with people who clearly refuse to use their brains because it’ll lead nowhere. Some people are already too committed to being hateful, negative, and miserable online that no amount of explanation or logic will change their minds.
even as a fan of an actor, i can still choose to drop their drama halfway through if it simply isn't my taste. i'm quite picky. more than the actor, i tend to judge a drama by its plot & execution, and i don't think there's anything wrong with that.
everyone has different preferences. the problem begins when people treat their own preferences as the only correct ones and judge others. if i don't like a drama or an actor’s acting, i usually choose not to talk about it publicly.