Sorry that is your experience. It makes therapy harder, as it is their job to help you find your strength so you can cope without them (or if they can't, maybe help you find a therapist who can. It's not like other relationships, though it is often even more intense.

I really feel for you, but I know you can get through this; you've survived so far after all, haven't you, despite all you've been through.
I hope this experience will prove to be a stepping stone towards feeling more able to cope in the long run.

Take care and be kind to yourself.