Ohhh, I got a few.
to start: Characters relapsing from their development immediately after they get said development. It feels like it absolutely ruins the point of character development.
Hmm.. what else.. The "Best Friend" trope character being an absolute dickhead (Like, it's one thing for friends to riff on one another, but it's another thing for one side to be absolutely horrible to the other)
aaaand any villain motive of "Destroying the world/destroying [X Race/place/etc] for a non-existent/nonsensical reason)".
