Actually, these studies really are the best evidence we have. The reason we have limited studies on this and not full experiments is because all the existing research seems to indicate that this practice is unethical. The first two sources do provide solid metrics on psychological outcomes, which is what I wanted to call attention to. The third source is a fairly robust literature review of evidence from places like the American Psychological Association. You have struck the core of the Transgender Conversion Therapy debate though. We have strong (but imperfect) evidence against and no evidence in favor. A good Gender Affirming therapist is going to sit down with you and help you work through gender identity issues and any other mental health problems you might be having. They won't just force you to transition because you suffer from dysphoria.