Hey I FEEL your pain as I am in that same place myself. I guess I just hold on to the fact that what goes around comes around. I do belive that God does punish people and they will have to relive the pain they inflicted apon others. Maybe not in this life but in the next.
Its so hard to see the ones that do the most harm go about their merry way almost like they are protected or something. Just know that you are not alone in this feeling and you can get your creativity back. Just start by focusing on the buety of little things like fall leaves or a babys smile or the sunset. It does help. Peacful thoughts I am sending your way.