To me it's a no-brainer. If a T terminates you and you suffer as a result, and there is something you need to say in order to suffer less, why the hell not. My sense is that some therapists get very little meaningful feedback and live in a fantasy world where therapy is as pure as the driven snow.

If she subtly abused you, took your money, then crushed you… I personally would not be worried about her being upset. She should be upset about that and should know the truth. And if she cant handle it, she can always speak to her own therapist about her hurt feelings, and so on. I understand your nervousness though.