#like math

As it is with most things, our first interaction with math in large ways influence how we see the subject. Most people’s first interaction with mathematics is in school, where our experience heavily depends on the teacher.

Other factors obviously play a role. If you have a disposition for math it’ll feel easier and more rewarding, making you enjoy the subject more. I also think math is a subject where the really beautiful parts only become pronounced later on, when you already understand the basics.

But even so, most people I have met who actually hate math have also had bad math teachers. I have never encountered a person that hated mathematics without associating it with someone or something else. On the other hand, I don’t necessarily think this is entirely a failure on the part of the teacher. It’s extremely difficult to teach 30-something kids that would rather be anywhere else, keep up with your other duties, get by in an underfunded & mismanaged industry while also trying to make the subject interesting to a bunch of iPad-having children.

Honestly it's hard to say.

Though it's called My Hero Academia, the academic part isn't showcased very often. From what we're shown Heroics Class seems to be more about learning the more practical parts of Hero Work, like how to physically fight, and take down villains, or rescue people. It doesn't seem like a huge book learning class, which is why All Might's a good fit for it, since that's what he has exceled at for decades.

As for if he was a good teacher, I think he tries to be, but obviously doesn't have teaching degree like teachers are supposed to, and went with his gut on most occasions. He's not the best at equally giving everyone his time, because he's there to mainly focus on Izuku. Which I totally understand why, he's not as involved with everyone, but it's not necessarily a good thing to do as a teacher.

Since he had already chosen Izuku as his successor, it might have just been better for him to keep being his privet tutor, instead of trying to be a full on teacher at UA. That or he should have just taken Nighteye's advice along with Nezu and started teaching sooner so he had a better grasp on how to educate teenagers better.

As for him being to violent, or letting Izuku fight Bakugou to long, I'd have to say that's fine, mostly because the story doesn't really call it out. Like fights in shonen are generally supposed to be brutal so I don't tend to put a "this person is to violent" negative label on a character unless it framed as bad, which I would argue All Might's not in those two instances. Like compare how his training fight with Bakugou and Izuku is framed as opposed to how Endeavor training little Shoto is framed--it's totally different.