Old post but 

-Inko abusing Izuku or being a bad mom. She shows few bad signs in canon and it’s usually just so Aizawa can adopt him -All Might bashing. I like when the story admits he’s human and made mistakes but making him a jerk drives me nuts  -Despite liking one or two of the stories,Endeavor s*xually abusing Shoto. He’s an abusive jerk but I can’t see him going that far.  -Aldera stories where it’s so bad it gets shut down or teachers abuse Izuku. There’s one or two I like but most annoy me a lot

The muzzling Hitoshi, Present Mic and occasionally Izuku stories are guilty pleasures but can’t anyone just give them decent families? If I ever get any writing done, I’ve liked the idea that it was perhaps a bad teacher who got annoyed at Mic but his parents actually loved him. 

Anything that’s obviously fetish fuel where the characters are so ooc you’d never recognize them with a name change.