And here we're shown just how vacuous the entire thing is. "Why did you want to be a hero?" "Because it's cool." Except, after he got an aptitude that wasn't exactly what he wanted, he put no effort into being cool at all. He used boring clothes, hid his true power, had an awful personality, and did not communicate with his team. It's not clear why he hid his power too. Was it illegal for him to train under the previous demon lord? Was he worried that he'd lose his non-existent popularity? And all this doubt about fighting for the monsters, the fights are just entertainment. It's like a wrestler having angst over working as a heel (bad guy).