I've turned into a horrible person and I hate it.

[Beetwasher.]

9. No, You're Not, You're Human, And

Your feelings are justifiable. Also, you have self-awareness enough to explore your feelings on the matter and feel guilty about your schaudenfreude, so you're emotionally evolved enough to examine your thoughts and behavior and how it effects others. This makes you a good, thoughtful person who is justifiably angry at the selfish, destructive shitheads in the world. No one cried when Hitler died. Now these folks are not Hitler, but they would probably be Hitler, or follow him, if given the chance. So, you're not a horrible person at all. You're a good person, who can and does reflect thoughtfully on themselves and deplores the evil that is around us. No need to feel bad about it. It's essentially Darwinism in action.