Kacchan is an amazingly written character and he's alot more then you're cliché- angry bully

He wears a plastic crown

Bakugo is very talented he's good at everything he tries so everyone praised him and treated him as a god and gave him this plastic crown . a sign of a ruler a king I'm better class then you and at first Katsuki adored it he loved it but then time moved and he realised that he had to protect the crown he was scared if it knocked off people would see he's just human. So he gets angry doesn't let people close cos if they see he's human his life is ruined

It was so sad so horrible sad
Deku helping him on the log bridge actually wrecked him so badly

Bakugo is as I said worshiped as a in life and to him a MORTAL walked up and said I'm on the same level as you  and tried to help him.
Deku sees Kacchan as an equal but Kacchan flipped out cos no ones ever treated him like thag
Like that's how it felt for Bakugo He's scared of Deku cos deku is so close to knocking off his fake crown so he trues to scare him away and protect it

But slowly 1a is working with him so show him it's okay to be human and

Kirishima met him and he was like in Greek mythology Nike to Zeus
She was the one who rode his carriage
Kirishima was: I want to help you reach you goal
He also, as he know puts on a plastic crown by pretending to be manly when he went through his own trouble but thats another chapter-

Kirishima showed the power that he was going to help Bakugo keep his crown on and not knock it off
And he worked slowly to stand next to him

Deku acted like he was on his level the whole time

That is 1 part to why Bakugo is am amazing written character comment below your thoughts or request to which characters I should analysis next! Its almost 2am so I need to sleep but :) this is a book I'm hoping to launch
I'll get a cover up when I'm awake