Please relax. Psychosocial is not a diagnosis. It’s a category for assessment. In your case, it looks like someone wrote it in the wrong place on a form. To do a “psychosocial” merely means to take a brief history of someone’s psychological and social development. It provides an overview of your issues to those who are trying to help you.
As far as I’m concerned, diagnoses are only a way to quickly and broadly summarize someone’s issues and to direct appropriate medication treatment. After you get a diagnosis, you still have the problems that distress you. If you want to get better, it’s up to you to do the hard work with your therapist.
A therapist can provide guidance and support, but you need to do the daily work. People improve when they do two things: 1) They make the life style changes they need to make to be physically healthy and 2) They work hard in their therapy to better understand themselves so they can make healthier life choices.
Please stop being so worried about what is on a piece of paper from years ago. Focus your attention instead on what you can do now to be an active member of your treatment team.
I understand your reluctance to see another therapist if you’ve had a negative experience. But, please, therapists are no more alike than other people. Give therapy a chance. Make an initial appointment with another therapist. If you don’t feel comfortable with him or her, bring it up. Sometimes talking about the discomfort is what inspires insight into other relationships as well. If you feel you aren’t being helped, go for a second opinion to a different therapist. If that one doesn’t work out either, it’s only fair to ask yourself if the problem lies within you, not the therapists. That may be the very issue you need to work on.
I wish you well.