It all makes perfect sense. I also have only two people in the history of my life that I wish only well but never want to see again, because the wrong they did me (and others) was not out of weakness or carelessness or ignorance or a moment of anger or passion but a pattern of grossly taking advantage and preying on others that they had rationalized and justified to themselves as acceptable and normal and felt comfortable repeating and had no interest in changing.
I only have 2 people I've known in my life that I have a strict 'never again' policy on. The reason for this policy for these specific people is that it seemed like they actually were horrible, manipulative, mean people at their core who maybe they did nice things once in a while. As opposed to most people I know who I believe are truly kind and good-willed at their core, who maybe do hurtful things once in a while.
But typically I get the sense of which type of person someone is early on in the relationship, so I don't usually put in a lot of effort with horrible people. Truly manipulative, awful people though sometimes wear the best masks at the start of a relationship, and thus I allowed them to get too close to me because I wanted to believe that what I saw at first was true.
Does that make sense?