A few points:
1. I'm sorry you've experienced this. However your personal experience can never justify a wholesale attack on a whole industry/profession. I had trouble while high school aged and saw both a psychiatrist and a psychologist, who both got the diagnosis wrong. The psychiatrists was worse, practically slanderous. About five years later he got busted by his own wife having sex with clients and got debarred and sent to jail. I don't know what happened to the psychologist who got it wrong. Bottom line is the first one was criminal and got caught, the second one was trying to do her job but got it wrong, and NEITHER of them represent their field or profession.
2. Psychologists can't prescribe medication of any kind, they can't even recommend them. No psychologist could put you on anti depressants.
3. Regression therapy, repressed memories, memory recovery are widely regarded as bogus within the field of psychology. The concept reached its height in the 1990s, I'm guessing that was when you experienced it, however it was mostly practiced by "therapists", most of whom didn't have anything like the level of education psychologists have to have in order to be properly registered. Regression theory is based on some concepts put forward by the famous Sigmund Freud. Though there are psychologists in Australia who take Freud seriously, they are few and far between. Psychologists today are expected to emphasise evidence-based approaches to therapy, and can get into a lot of trouble if they don't. Freud famously never bothered collecting empirical evidence for any of his theories, he mainly gets attention in current modern psychology textbooks because he got a couple of things right (e.g his concept of the unconscious mind), because his theories were influential for a time, so it is important to understand them, and because many of his lesser known ideas are good examples of what NOT to do. If you got treated by a Freudian therapist you are somewhat unlucky, they are a vanishing breed in Australia.
4. The field of research that uncovered the fallacy of repressed memories was psychology. Check for example research done by Elizabeth Loftus on memory. We have psychology to thank for debunking that particular idiocy.
5. Just be glad you aren't
George Franklin or his daughter Eileen.
Bad things happen to people all the time, and often because someone was trying to do what they thought was good and helpful. You might think that your post is helpful, but if someone reading it decides they won't go and see a mental health professional about the lengthy depressed mood they have been experiencing or their sleepless anxiety filled nights or their suicidal ideation, all of which are eminently treatable with help from well trained mental health professionals, well you've hardly helped them have you?
And no, you most likely didn't have a traumatic experience when you were young. The evidence is you'd remember at least part of it without any particular therapy needed to help your memory. You don't say what your condition was, but you can always take one diagnosis to the bank: human.