Superheroes are not salarymen. They're more like rock stars or professional athletes. Their personas are a huge part of their ability to be successful.
On the one hand, that makes logical sense. On the other hand, if they did that, he might as well not be in the series anymore, because his attitude is the only thing that makes him entertaining to watch.
I feel like Bakugo ended up really unlucky. He had a TON of offers, I'm betting they weren't ALL looking to teach him a lesson in humility.