It was not the USJ incident but a war added because shigaraki was mad that he didn't get to take any hits on anyone and got shot needing protection from Kurogiri. Everyone was separated. You were a villain with a very inhumane quirk. You got paired with Bakugo by Kurogiri's warp because he knew that you could take him out no matter how much of a challenge he throws at you.

Bakugo:HAH!? THIS IS WILL BE EASY. SCRAWNY DAMN VILLAIN!!