I can never tell, when people post that they're stressing about such clear non-starters, whether it's some kind of incel wind-up. Or a content creator looking for material.
My second, kinder thought is that it's just one of those things that happens to nice women who try to see the best in men. And whose expectations of relationships have been skewed by romantic tropes from their formative years.
I've been there myself, post divorce. Put up with lots of shit from men who are "difficult" - who struggle with their mental health - whose true genius has never been fully recognised by their family / ex-partner / boss / industry /school / government / the world at large. It's depressingly common.
For an idea of how dangerous men's exploitation of romantic self-delusion can get, see any number of documentaries and podcasts. One that comes to mind is The Other Mrs Jordan , which was on telly recently.
So OP. If someone messes you about, and makes you anxious, confused, afraid or unhappy, it might be that they have a genuine mental health problem. It might be that they're deceiving or scamming you in some way. Either way, do you really want that to be your life?