Yeah, what Aries said-HE sure isn't invested in trying to validate YoU! Much better use of your time realizing a sick person can't validate you, nor do you NEED his validation. He is not your source of the truth.
My ex used to complain that I didn't treat him nicely or act like I respected him. Well, he was abusive so I think that released me of my obligation to respect him as his actions were not those of a respectable human being. More like pond scum, which I don't respect or treat nicely either!