Bakugo grew on me. He was a bully and he has a temper. But the best stories have the worst starts
That's why Deku will be the greatest hero ever, he was bullied and mocked for his goals: to be a hero. Despite no quirk, the greatest hero All Might trained Deku. Deku surges to be the next symbol of peace
With Bakugo, he was an asshole and bully to many. He is slowly learning to respect others and he eve made amends with Deku. In the license exam, Bakugo showed he cares for others, through his actions, not words. For example, when Bakugo was fighting MeatBall, he made sure to decrease the size of his blast radius, so it wouldn't hit his teammates
Kaminari even said it himself, Bakugo is aware of his teammates and he doesn't want to hurt them
Now if Bakugo joined the league of villains, then that's another discussion. But he went up against a whole team of them. He shows bravery and his skill set is top-notch. That is why he is likable.