Very tentative suggestion: Your post made me wonder about the underlying assumption that personalities just heal if damaging effects are eliminated. I may be on a path like that, but that doesn't mean it's true in general. It's possible that sometimes improvements need to built rather than allowed to happen.

I'm not sure you and I mean the same thing by "amplification". I meant something like "you're such a piece of shit" (addressed to me), and then I start repeating it to myself, mixing it with thoughts about how defective I am for having something like that in my mind. What did you mean?

When I think about your situation, it does seem that you have a rather different tangle than I do.