Why is this character exactly bad? Being an annoying character doesn't mean it's not well written

Dude, he's often only entertaining thing for pages.

Him and Deku have the worst 'rivalry' in Shonen. Bakugo tells Deku to fuck off then Deku sucks his dick. That's basically their relationship

the problem with the vast majority of the character of mha, is that they don't have development, most have a good base, good motivations and a good contruction, in that sense bakugo is well written but almost no character in mha has any develoment, the only one that does is endeavor, he is the only one who really changes in his personality and tries to become better, bakugo hasn't, deku hasn't no one else hasn't, so even if they have a good construction, not having development is a pretty huge flaw, means they never change.