I'm sorry that that is happening. That sounds like it's really draining.
Maybe try writing out the dream how it is, then try writing out a slight variation of the dream where it's less horrifying. A couple days later, write out a new and even more positive version of the dream. Keep trying this until you get to a version of the dream that doesn't make you want to rip your hair out.
Writing this out may not make the dreams actually change, but it might help with some of the unsettled stuff in your subconscious.
I don't know. Might or might not help, but either way I hope that you are able to work through this with a T (if you have one) or trusted friend.
Don't let this steal your dreams! (Literally)