Yes, they're still married but are they happy? Do they wish their wives were better cooks?
Yes, they're still happy MashaAllah. I know them pretty well.
Does wishing your spouse were a better cook necessarily mean that he is unhappy with the marriage? No. It doesn't. Nobody is perfect. You might wish that your husband were more helpful around the hosue.....but that is not going to be your sole reason for labeling the marriage and "unhappy" one.
You might think your cooking is bad, but he might like it for all you know. And what if your other qualities (such as being straight up, for example) make up for the lack of culinary perfection.
"The way through a man's heart is through his stomach." It's a quotation and most quotations word things in a MUST BE LIKE THIS/DEFINITE way. Like all other quotations, it doesn't always hold true. If a guy marries you, he obviously considered more than just the cooking before saying, "I do."