In a lot of ways, I don't think there's anything wrong with lashing out/being hurtful with your T. They're the best person with which for it to happen. They can help you understand it and deal with it. To find the things under the surface. They generally will not take it personally. In most cases, it will not permanently harm your relationship, and if it is they will let you know.

I think the amount of anger and hate clients feel might begin with why they're in therapy. The heart of my issues are relationship oriented, so it makes a lot of sense that I'd have anger and trouble dealing with it. Someone trying to recover from abuse or traumatic events might not have the same type of therapy with the same therapist.