In his mind, he is not in the wrong and he never, never will be. That will not change. All you can change is you. You just have to work around him . . . and ignore whatever is too ridiculous to take seriously. He'll get the message, and he'll give up on some of his extreme stuff, if he sees you pay no attention to it.

You can't wait for him to say, "Okay, you deserve to be treated like a human being." You just have to do what makes sense and blow off what is not fair for you to try to do. He has way more ability to adapt than you might imagine. If you are too tired to cook and you just don't cook, he won't starve. One way, or another, he'll manage to get himself fed, once he gets hungry enough. Leave those socks unsorted, and he'll figure out how to find a matching pair.

But he'll never, ever say, "Yeah, you were right and I was wrong."