Earlier quoted context omitted.
The kids being down at 730/19:30 doesn’t mean everything is done: Laundry, cleaning after dinner, tidying up, ordering groceries/making shopping lists, actually doing groceries, fixing something in/at house/car/garden, taking out trash(diapers), paper/plastic, researching which child seat to buy when they get bigger, parent/teacher sessions. This when you are lucky. Maybe even preparation for work or study is needed…
Have you tried outsourcing all the chores? Get a nanny, a gardener, a personal assistant, hire handymen, don’t cook at home. Sorry for being analytical about it, I am personally interested in having kids—and so far it seems to me that you’re overburdening yourself with too much stuff that you don’t have to do at all.
Also, I have found that there is significant benefit in doing chores yourself. At least it gives me a sense of accomplishment and a chance to do something with my hands instead of thinking a lot and then wiggle some fingers to type or draw PowerPoint.