Have you considered the possibility of a negative transference? I expect that may be what I'm doing now with my T, after 6 years of basically good therapy that has allowed me to function better in the world (in some ways). But what I seem to be obsessing over is all the ineffective, hurtful, "bad" therapy and therapists who couldn't deal with the (likely same) negative transference when it appeared.

Would have helped, I think, if my T could have explained what was going on. Is that something that in your case you feel like you would like from your T?

Just in case this strikes a bell or seems interesting to you, here's a link.

Navigating Negative Transference | Psych Central Professional

How does resolving the negative transference help with self-worth? That's the unknown that I can't know until I know it because until it emerges I don't really know myself. Or something like that -- I think maybe I can see it coming but still not there yet.

And it may not work -- certainly won't if client and therapist can't actually work through the transference because the T is not good enough or isn't aware of his/her issues/countertransference or something.