It's worth noting that in-universe, Iruma is very strong, especially for his age. The only reason he seems weak to you is because he's constantly surrounded by characters that are on the end of the spectrum when it comes to strength. He and Alice are both rank 5 as second years, almost assuredly amongst the most skilled students at school. Even just last chapter, his arrow breaking through the barrier of someone THREE ranks higher than him is meant to be an insane display of strength. If you're looking for something much more bombastic than that at this point, I feel like you're not really following the logic of the story at all.
EDIT: Nevermind, I read some of your other comments and it's clear that you just want this to be something it isn't.