Alright
I watch some my hero, so I can actually commentate on Bakugo to a degree. Mind you i'm on season 2, but I've fucked around the spoiler tag for a while because I'm a HUGE fan of the Big 3 and Fatgum agency but anyways not super important.
However, keep in mind Bakugo has been sweeping #1 in the popularity polls since the second poll and pushing Deku THE MAIN PROTAGONIST to either 2nd or 3rd place respectively with Todoroki.
In a nutshell, yea Bakugo is pretty much a loud grumpy fiery edgy little shit. at the beginning of the series. However, after getting his ass handed to him a few times, even by Deku, Bakugo realizes "hey i'm not as tough shit as I thought. Better change it."
So yea he's still an asshole, but he makes an effort to make an effort to not be a MEGA asshole if that makes sense. He is competitive, he wants everyone to bring their A-game such as in the sports festival he was PISSED when Todoroki held out on him to the point when Bakugo did get the 1st place medal he was like "I DON'T WANT THIS SHIT HE DIDN'T FUCKING GIVE IT 100% THAT'S SOME FUCKIN BULLSHIT CHIEF I TELL YOU THAT!"
Outside of that, Bakugo overall is just kind of a grouchy person, but he knows who's friend and foe, smart, tactical, athletic, actually has some of the highest grades in his class, and has great skills in cooking and music but he doesn't really care about those. Hell the class calls Bakugo a mood booster more or less.
Bakugo's character development can probably be summarized as a slow burn. However, atm in the manga he apologies to Deku for everything he's done wrong more or less. He's had some great growth over the series from what I can see, but if anyone can add onto this feel free I haven't touched BNHA in a hot minute.
TLDR: Bakugo is a slow burn character and more than just an asshole, fans really got mad Bakugo told Deku to kill himself and it's been a hard fire ever since.
If anything, Kevin is just an asshole. He WISHES he had the achievements Bakugo had but it still doesn't excuse being an asshole.
Also, Kevin, Deku is a Shonen protag no shit he's gonna be wham bam magical thank you mam. Deku is essentially Naruto lite, but minus the traumatic past and being related to the ninja equivalent of god. Don't even get me started on Rock Lee's entire under dog story, but i'm already calling bullshit if Kevin is saying Bakugo and Todoroki are Rock Lee types when they aren't and it wouldn't even be a fair comparison.