What are the worst examples when a writer wanks off a character in order to show how awesome they are but its done in such an obnoxious way that you can't help but roll your eyes at it. For me, It's Bakugo in the upcoming arc of the anime and the JT arc from the manga:
So in this arc, Class1A and 1B are doing training rounds against each other. In Bakugo's round, he beats a recommended student and pretty much manhandles everyone with no one on his team losing and this is all done in 2 chapters while everyone is praising him for doing what others have done from the start.....cooperation. I mean Todoroki, like one of the class's strongest struggled and got knocked out along with Tokoyami in the round before that. It's even more jarring when after that, All Might says Bakugo is a good childhood friend/good friend, despite him doing nothing but bully Midoriya for most of that and having done nothing to show any kind of good friend behavior. Yeah this was pretty bad