I subscribe all what have been said here.

Diagnosis is their psychiatrists’ concern. Yours is the way you are treat and why you think you deserve this treatment. You don’t. But, you are allowing. This is the point to work on.

You are the most valuable you have although you can’t see it. Use the experience as a starting point to empower yourself.
Look for other similar patterns in the past. Use a journal to write down your experiences. You are allowed to complain and express whatever you need to put outside but never show these kinds of people your weakness. Set boundaries and set up them.
There’s a person whose videos are about setting boundaries with others. Especially manipulative people. I can’t remember the name of the channel. I’m gonna do some research and paste it here.