I'm so sorry you're having a stressful and hopeless time. 11 years of therapy and still feeling depressed? It's good that you can function OK but I certainly understand that that is not enough.

I had been dysthymic for years and then had a breakdown 10 years ago. I certainly wouldn't recommend that (!) but it sent me looking for some serious, different therapy, and eventually to a Ph.D therapist with some extra training. That seems to be helping.

Somebody on another board mentioned "schema therapy". People are using it for personality disorders as well as other long-term treatment-resisitant disorders. Maybe it would be worth looking into?