When a therapist can't help any further i don't think it's necessarily anyone's fault, it's just a fact of training in any particular area, that's all, nothing personal. How a therapist deals with that situation is within their control. She treated you badly at the time but at least she's doing the right thing now my not muddying the waters. Her reply was curt but also clear. Can you process all of this with your T? It's the only way you'll get closure.