If you ASK him about a particular trait and he feels there’s room for improvement then I think he’d be justified in telling you. Or if there’s a situation that he sees you being taken advantage of… (you mention being a “doormat”). Otherwise I think I’d have to have a serious discussion about the inappropriate way he talks to you. I mean, seriously, who makes that big of a deal about how another person peels potatoes…at least you’re doing it and he doesn’t have to! If he can’t be more positive and less critical you may want to reevaluate your relationship.

But, before you do that, make sure you’re not inadvertently doing the same thing…constantly pointing out his flaws or things he does “wrong”. It’s an easy habit to fall into.

Good luck and I hope you can resolve this issue!