A bit of a Deus Ex Machina but okay.
I still like that "evil" Iruma isn't evil but just really self-confident. Like he still respects those that help him and isn't really selfish. Like he doesn't do anything that would qualify as greedy, manipulative or with the intention of destroying stuff. He just is honest from square one with his intentions and is actively just trying to make the lives of the "different" students better.