I like your response and that you tried hard to get better. I have PTSD and Ocd due to childhood trauma. In addition, I have other health issues that probably stem from it due to the constant stream of cortisol flooding my system and poisoning my body.
Anyway, I think you're right. Eventually, you try enough therapists and medicine that you realize you've done all you could to improve. In another thread, a user said that to ctb peacefully you have to "let go," so I suppose that would mean accepting thar you did your best and unfortunately it wasn't enough, but that's ok. It's just the way things are. I find that somewhat comforting.