Do you have a lot of stuff? I've always had an very clean and tidy home, people always ask me how I did it when the kids were little (have help now) and that's my answer, barely any stuff
. My parents were filthy hoarders so I have a huge incentive for keeping things clean and organized.
Snuggly, low lighting helps to make it look less bare, then flowers and some big fat pretty scented candles placed nicely, throws etc, looks homely even though it's really minimal. Trickery is essential
, the lighting especially helps for ignoring some dusty bits and all those little things.
If everything is minimal and properly organized (ie no silly complex systems, just everything in it's place) then it's just basic maintenance.
With cooking, the freezer is your friend.
Even when the kids were small I did drop my standards a bit, it became more about basic hygeine covered and everything looking nice as apposed to my normal hospital clean and every little thing color coordinated and organized properly. Take the reins off a bit, hide it with tricks and relax.
Also, get yourself a couple of These, amazing. They can just be thrown in the corner once they're in bed.
Finally, explain to your DP that he needs to make more off an effort, even if it's just wiping down the kitchen and bathroom every day, it will take no time if you're on the kids and it's one less thing for you to do.