You’re on a great path, buddy, seriously, just because of how self-aware you are, even if you don’t know yet how to escape your inner hell. I used to have a lot of anger as well, and sometimes still do, but also felt guilty about it later on, and knew it was unjustified. It’s all about the unresolved deeper issues. I’d try to find a therapist experienced with NPD that you can also trust completely, and trust the process.