I think its time to let go.

You're trying to rationalize something that can NOT be rationalized. Its like trying to find your way out of a never-ending house of mirrors. Or like living in the twilight zone where nothing makes sense. Or even like falling down the rabbit hole.

You have a rational mind, he does not. There is no rationalizing with these people, there is no reasoning, there is no normal interactions, discussions, etc. The harder you try, the more frustrated you will become. There is something inside of them that is "broken" and cannot be fixed. (I hate to use that sort of term, but yes, there are disorders out there which cannot be fixed no matter how many drugs a doctor prescribes you or how many therapists you see. Some people are just missing SOMETHING that cannot be replaced or fixed.)

Moving on is hard, but I think it may be best for your own health and sanity. Good luck.