Yanbu
Having kids alone is absolutely exhausting nevermind everything else.
If you genuinely feel depressed do speak to your doctor, anti depressants made a huge difference to my mood and desire to get up and get moving each day.
We have a family planner on display in the kitchen. (See pic attached) Each person has their own section and a 'misc' section too. At the start of the year I put in all birthdays to remember, school holidays, Inset days etc. When the weekly school newsletters are sent out I take a few minutes to put anything important on there for each child. It really helps to see everything for the month at a glance for the whole family. It also means that it's clear of anything will clash or if childcare might be needed.
Can you batch cook and freeze portions?
Or try a subscription for food packages of easy cook meals with everything you need for the week included? It would cut down on food shopping and having to think too much about what to cook.
I try and make some meals that will have enough leftovers for everyone the next day so a couple of days are just easy reheating a cooked meal.
I try to have a quick dash around the house at the end of each day once the kids are in bed and do a very basic clean to keep things looking reasonable between big cleans.
Antibacterial spray on kitchen surfaces, quick squirt of window cleaner on the glass doors (as the kids lick them daily and make handprints everywhere), vacuum, plump cushions, simple things that don't actually take very long but just make the house feel tidy. I don't relax well if I can see crumbs on the floor or sticky finger prints
I do a 'big' clean every couple of weeks but doing little bits here and there make it still feel ok in between.
Im no good in the morning so I try and do what I can the night before. Put uniforms out for the kids. Have bags and coats and shoes ready by the door. Make sure dishes are washed dried and put away so the sink and drainer is clear for breakfast pots.
I also am very strict about finding myself at least one an hour a week just for me. I have a hot bath, hair and face treatment masks, I trim my nails and paint them, tweeze stray eyebrow hairs. I always put moisturiser on my face too. Basic grooming that makes me feel better when I'm having to rush out in the mornings. There's no time for fancy hair and makeup on weekdays but I feel better knowing I've taken the time to look after myself. But it could be anything that you want. Exercise. Read. Lie infront of the tv. Whatever you want!
Don't be hard on yourself. Try some of the tips on this thread for managing your day to day life better. Speak to your GP. If you can easily afford a cleaner or babysitter/nanny to take some pressure off then do it!
It will get better with time.