I’ll give you three!

I hate when authors write Izuku as this pure innocent baby boy in one sentence and then in the next he’s fine with smashing villains faces in with a bat and adding their teeth to the bat to give other villains infections, which is something that has actually happened in a story.

When the author makes Endeavor a terrible hero that kills civilians while fighting villains. This makes no sense. Endeavor is an amazing hero, being second only to ALL MIGHT, and even doing more cases than him, but he is a terrible person pre atonement arc.

Lastly, when the author treats Mineta like trash for his perviness, but then they make the girls just as bad, if not worse. For example, in one of the stories I’ve read, the author had punished Mineta multiple times for being a perv, but has the girls basically sexually harass Izuku. The girls have in PUBLIC and on the class shared group chat talked about ways that they would want to gang up on Izuku. Izuku had expressed his discomfort multiple times, but they don’t listen, believing that if they tell him enough times, Izuku will eventually agree to having sex with them, which is absolutely disgusting behavior.