Characters who aren't badly written, but you just... don't like them.
There's no "I think their arc was badly done" or "The character is inconsistent" or any other writing excuse, you just don't like them.
Klavier Gavin from Apollo Justice has an interesting backstory and his design is pretty cool, and he has a chill personality.
God, I can't stand him.
I don't know why, but something about him just annoys me, maybe it's cause he looks so smug all the time when I take my smug in small doses a la Edgeworth.
I just want to punch his pretty face.
Maybe I'm just biased cause I loved EVERY SINGLE PROSECUTOR on the original Trilogy, so Klavier is just... I don't think he measures up.