It's very, very hard for a while when they're young.
But persevering with the little ones now, even if it does end up in a million fights, will pay off loads later on in life. So getting the book box tidied up is the hill you do want to die on. I worked on bribery and blackmail until they did what was needed, i.e. no Peppa Pig until you did x, but if you do it you can also have y. Do involve them in simple tasks like sorting the washing.
As for everything else, lots of good advice already. I, too, had no village.
Do not feel guilty for leaving the children in childcare for the time you have paid for - I used to pay for them to be in until 6pm and if I finished work at 4.30 I'd use the extra time to get something done in the house, then collect them for 6pm rather than 4.45pm which I could have done.
If you're a morning person, get up at 5/5.30 rather than 6. The extra 1h-30min - be that time to read, time to just sit with a cup of coffee or time to work - keep me sane even now they're much, much older. If you're an evening person, make a point of doing nothing for the last 30min before bed at least.
During the day at weekends, do what nurseries do (I've seen them all do it) and give yourself a break to get on with household stuff by using the TV for an hour. It's usually when they clean floors and you can also just get on with things that are more dangerous, like bleaching the toilet, in peace.
Your food routine also seems to be causing you issues. No need to batch cook and reheat all the time. Chuck things into the slow cooker and you have dinner pretty much ready by the time you need it.
Pre-diced meat, a few handfuls of vegetables, pepper, paprika, cinnamon, water. No need to precook, just leave it on at low heat from the morning and all you have to do in the evening is stir some gravy granules into it and ignore pasta while it cooks. Goulash.
More water, some barley added - stew.
With some pre-fried spices and onions, add coconut milk or tomatoes and only cook rice in the evening - curry.
The possibilities for this are endless, but none are requiring you to think about food for more than 15min a day. Batch cooking is fine if you have time to do so and decent re-heating facilities, but it seems to take you more time than it would to throw a qucik meal together.