Moo, it is your decision at the end of the day. You are allowed to right a review, but if you are asking for our opinions, I would recommend to take it down, or write an honest review. If you find her services to be problematic or unethical, you could take it up with her state board or speak with a lawyer about your rights as a client. You don't need to answer this, but what are your motivations behind writing this review? Is it anger, revenge, warning? Depending on how you answer it to yourself, it can help guide you into the direction of keeping the review, deleting it, or revising it. As everyone mentioned, psychotherapy is very subjective to the individual. Other people might have found her to be very helpful.
While, I feel like you have every right to feel upset and angry with how your therapy went; again a question to ask yourself: do you want to effect her/his professional reputation? Therapy is a business, but as one of the posters mentioned, writing a review for therapists is not very common. I've never seen a review of a therapist. It is your decision, and at the end of the day, do you feel comfortable with it? Have had a termination session with this therapist? This is just a suggestion, but it might be helpful to meet with her one last time and just directly tell her your experience of her therapy. Maybe that might offer you some closure? You can ask her if she is wiling to do the session pro-bono, based on your experiences. I wish you well and I do hope you find some resolution.