I was gonna say earlier that the girl who dumped him had reasonable complaints about him, but the thing about his hobbies being childish is an asshole thing to say. I mean, it's fine to not subjectively vibe with another person's hobbies, but calling them childish is like saying there's something objectively wrong with them. As long as you're not hurting someone else, you should be free to like whatever you want. And now it feels like MC is stressing himself out unnecessarily because he feels like he's not allowed to like what he likes, because of what that girl said.