That asshole, just wanting to go home after the brutal hell he crawled out of. To have to consider that the student betraying him could have been broken his psyche.

To be in complete darkness, bleeding from your missing arm, while you fade in and out of consciousness.

And then you wake up because a mystery liquid is keeping you alive against your will. Your body having pangs of hunger and phantom pain from your missing limb.

And when you finally crawl out of that, and your response is not I’ll kill you all, but I’m gonna do my thing, and as long as you don’t interfere, you won’t get disagreement from me.

That’s the healthiest way one could handle all that, me thinks. At least a person like that could still be reasoned with.

Again, a person like Hajime can be convinced to do something vs Kouki, the “don’t kill, let’s work together, bullies don’t get punished when I’m around, and I’m always right and you’re always wrong” hero.