I've been through a lot of therapists as well. After 10 years of trying (16 -> 26) I was also terminated by my last therapist. I honestly think it hurts more than it helps for me, which is why I stopped, even though it's the most commonly recommended remedy.. Same with emergency visits to the psych ward or suicide text/phone lines, after a while it's just the same thing over and over again and I feel even more pushed toward the edge. I can't accept some of the things that I can't change (financial mostly) which is required to progress in therapy. And I can't afford a therapist who could schedule me as often as I would really need. Don't do well in a group setting due to BPD. I don't like that everything is focused on distraction, when my problems are generally just caused by the way my personality and values mesh against society.
Sorry for not really being inspiring. For what it's worth, I think that therapy is probably helpful for most people and that I'm an outlier.