This is a pretty good website in terms of healing from abusive relationships in general, whether it was a legit psychopath or not:

https://www.psychopathfree.com/

The only qualm I have with the website is that it is strongly opposed to holding survivors accountable for working through their own issues and examining their own dysfunctions that make them targets in the first place. The website considers that type of thinking to be "sympathizing with perpetrators".

I disagree and don't see it as a matter of blame, just analyzing and bolstering your own defenses. But if you join, I want to give you that heads-up warning because it can be harsh to get banned from a support group when you're going through stuff.

So my 2 cents advice would be to check out the website for validation, and feel free to join for the sake of cathartic venting and sharing.

And then separately, consider looking into therapy for yourself to figure out why you tolerate abusive behavior and would keep going back again and again. Wiping out toxic junk from childhood conditioning and replacing it with healthy boundaries is a long and tough process, usually pretty messy, too. There are not really any quick-fix "answers" unfortunately.