Formal complaint to licensing boards seems yet another area of the biz where only the overt and obvious transgressions are considered relevant. If your therapy was truly harmful in an insidious way, but not in a way the board chooses to recognize, doesn't count. It's also potentially, like therapy itself, an opportunity to have your power taken away. Once again, a mental health professional will interpret your story and decide what it means.

At least with Yelp, the client has absolute power (provided they don't go hog wild). No interference from professionals, no proof needed, no bureaucracy. The client gets to speak on their own terms. Take back some power by publicly evaluating and analyzing therapist and therapy.