I really feel for you mate. Vulnerable people get targeted constantly and it's horrible... they can get in a cycle of never being able to not be vulnerable because they never get a chance to fully recover. The funny thing is that vulnerable people see people's true self around them.
The main thing is working on self esteem, having good boundaries comes when people have the self esteem to do them. Have you worked on the causes of your self esteem issues? Counselling can really help
Idk. Like, interpersonal psychopaths don't scare me as much cause I can always just ghost them for the most part.
My issue is with workplace ones (cause it's hard to find a good job) and also with the ones in my apartment complex. There's no effing way it can be dealt with I'm just screwed.
Workplace ones are awful, there's loads of research showing bullies often go into management. Best way I've found to manage it is not to tell anyone I work with anything about me so they have nothing to use against me.
Have you got much support in your life? If you're missing a dad's support you can find it at !dadforaminute@lemmy.world it's great and supportive dad posters.