The appeal of Bakugou is that he's really representative of people who have a natural talent in a given area but who are outshone by those who put in effort to learn and develop the underlying skillset instead of resting on their laurels. A large part of his anger is frustration that just having a massively powerful quirk isn't enough on its own. The arrogance is a layer over insecurity at seeing people like Deku find success when they don't have what's always been instinctual to him.

I was surprised how much I resonated with that aspect of his character, getting into the show. Loud arrogant bully usually rubs my fur backwards, but he managed to really work for me because that note felt pretty realistic.