Nicole, as you know, you describe a very abusive relationship.
I have extremely poor results confronting people who abuse me, particularly therapists.Some seem by title and training to have special reinforcement that whatever they do must be magical and healing. Trying to break through their delusions and self protections is an exercise in frustration.
It then goes back to me to untangle from that person, to sort out the lies and to cut off the damage. It's certainly a therapist abandoning responsibility, but I found that was my only recourse.
I'm sorry you have this enmeshment. The abusing person usually is so lost, they're the last person who can help. I filed a grievance long after my bullying relationship ended, and the therapist obviously learned nothing.