I'll admit to having done similar as your DH. I do most of the cooking. DH started making a stirfry dish he really enjoyed. It was OK, I could eat it, and I sure wasn't going to turn down a homemade meal that I didn't have to cook. But after a few years, I finally had to admit that I didn't really enjoy it that much. But I only did it after the kids started complaining about it.
So your DH could have looked at it as "She only cooks twice a week, she seems to like the dish, and I can tolerate it, so I'll tolerate it." He probably didn't realize that he'd have to be tolerating it monthly.
I know there are things that I make that DH only tolerates, but he tolerates them because he knows I really enjoy it and I make sure to only make it a few times a year.