EM-from my admittedly biased observation, and judging from the scarce literature and resources, I suspect that many therapists seem uncomfortable around the topic of harm in therapy. I sometimes find it difficult to "teach" someone about a subject when they have something to protect. Discussion around therapy can be as emotionally fraught and even as nasty as election politics, as evidenced by responses to articles in the NY Times and the Guardian.

I'm glad your therapist is trying to connect with you on this and wish you success. In an ideal world he should. If the topic remains too painful but you otherwise like him, one option is to use him for his strengths and seek other resources around your bad experience.

I have learned tremendously from my bad experience and am still learning. It changed how I see the world, mostly for the good, I think.

You can write these people if you chose. TELL: Therapy Exploitation Link Line
I'm not sure I'd use the words abuse or exploitation for my therapy. (I don't like to use words at all, frankly). TELL helped me feel less crazy and alone.

Again, best to you. I admire your insights and actions through these difficulties.