TTHO Imagine yourself as a single parent would you be happier? You would have NO ONE to help out with anything. You would still have to work do ALL the chores ALL the yard work ALL the home maintenance etc.etc. Maybe you think you would be happier because you wouldn't have to be married to someone that isn't meeting your expectations of what your H should be doing for you.
In an ideal world you should share chores equally but the reality is lots of women do most of the housework /childcare while working. Maybe it isn't fair but seems to be the norm. Does it cause resentment ONLY IF YOU LET IT. Stop expecting him to change GET A CLEANER and praise him for the extra jobs he IS doing for you. I know no one praises you for all the housework YOU do but men repond better to praise than nagging or BEING TOLD they're not doing enough.
If you don't want a divorce start reading and understand that the only person YOU can change is YOU