I want to say another word in favour of EMDR. It really is effective trauma therapy. Oversharing here, in the hope that it may help you.
I was a cPTSD sufferer too. The c's (and there were a lot of them) harked right back to my childhood. I had no recognition that I was traumatized until a major trigger happened, after which my physical health began to fall apart. The symptoms were truly terrifying, in particular the severe short-term memory loss that led me to think I was starting to suffer from early-onset dementia. I also didn't know that the overwhelming feelings I had of being submerged were actually the experience of flashbacks. It took the emergence of the #MeToo hashtag to make me realize I was getting sick in response to very specific triggers. And that's when the penny dropped as to what was truly wrong.
I had 18 months' intensive EMDR therapy, and although it's early days I now believe I'm recovered. Unlike with CBT, I don't have to constantly keep employing techniques to deal with my issues: EMDR works on its own. And while no form of psychotherapy can completely remove the memories, EMDR, if done properly, does strip the emotion away from them and enables an objectivity and clarity of vision I never even knew was possible. My attitudes to life, and people, underwent a radical change. I would have scoffed at the idea that I was ever a people-pleaser, being the unconservative type of person that I am, but therapy taught me that I was, and how not to be.
I know myself better than I ever have, and for the first time in my life now truly value myself. I don't internalize other people's shit, and it's been the most liberating experience imaginable. I didn't recover overnight. But although it's early days yet, I really believe that I have. I'm a different 'me'. But that is no bad thing.
And so will you. It sounds impossible now but you must keep believing that. If it's possible for me, when I was in the mess I was, then it's possible for you. You don't have to accept that this is your life forever. One day you'll smile again.