I think it’s the mindset of “yes the world is terrible. But it doesn’t absolve you of all the responsibility for your life, and how you act around others.”

Like being depressed due to a loved one dying doesn’t give you justification for pushing all your’s friends away and developing an alcohol addiction. Blame world for self would say that all of it was due to that loved one dying. Blame self for world realizes that they were the ones who personally drove others away, and they have the ability to change that still..