My Little Pony - Friendship is Magic
Trixie - absolutely unbearable, obnoxious with very annoying personality. Apparently she gets "reformed" in future episodes (I can't imagine reforming such shameless narcissism), but as of now I just can't stand her.
Mass Effect
Kai Leng - annoying edgelord taking a sword to a gunfight and obviously facing permanent consequences of that in the end c: Good riddance, for
Star Wars
Jar Jar Binks haha no. I am more original than that. In fact Jar Jar, while obviously being a bit too over the top doesn't deserve hate he gets IMO. I actually really dislike Mace Windu. To me he represents many problems of jedi order before the downfall - arrogance, disconnect from others and lack of ability to actually talk to different people. His actions led in no small part to Anakin's downfall making him feel unheard and humiliated (not to mention they led to Anakin's Padawan leaving the jedi order).
But it doesn't take away my enjoyment from franchises they are from. And I am not even saying they are poorly written (well, except for Kai Leng, I hate that guy xD). They just really grind my gears with how they act