@Kage-Ao Yes, this is correct. But what I meant, is that they don't know how much damage their self-destruction is causing to those around them.
They lose sight of everyone else in favor of elevating their hatred of themselves, and that drives them to be blind toward others.
I will say suicide is the proclamation that someone doesn't have the will to try and better themselves, so they remove themselves instead. It's not selfless to murder yourself.
I've thought a lot about this subject from both sides of it, and that's what I've arrived to.