Most of the time, what people say to us has more to do with them than with us. Other times, and I think your example is one, we can provoke people into responding in hurtful ways. I don't see this issue as about the therapist, I see it as your issue with expressing yourself in the way you described. Rants that are angry and hurtful should be expected to provoke hurtful reactions in people. To me the question is how can you work on expressing yourself in ways that don't provoke others to hurt you-- with this therapist or another one?