I look around me and I see successful women who work AND run a home, run after their kids AND look amazing?? I wonder how the hell do they do it? I can barely get motivated to wash and dress in the morning??
Don't compare yourself!
I used to be a sahm - very focussed on the kids, house was okish but messy, never liked cleaning, do cook properly but I'm no housewife...
I was quite self satisfied and complacent with DC1 and 2, thought I knew what I was doing, did tons of stuff with them, was a childminder when I only had DC1 and carried on in full outstanding childminder mode when I had DC2 and only "minded" my own 2.
But I lost my mojo with the full time mum thing a bit when DC3 came along and turned out to be the non sleeper who cracked me. He really wouldn't sleep for more than an hour at any time of the day or night for years, despite doing all the same things re routine etc I'd done with DC1 and 2. I saw all the night waking and child care and house stuff and food stuff and laundry as my job because I "didn't work" and fell apart physically, put loads of weight on, developed weird physical aches and pains, back problems, hip problems, utterly lost my motivation, felt lost and pointless, got into a position where DH set up a separate account for me which had to pay for all food and clothing and activities for the children (and for myself and DH) and found myself having to choose between buying bananas or paying for playgroup despite DH earning a good wage and buying himself things on a whim... I felt worthless. I let the kids watch too much tv, I couldn't be bothered doing as much with them, I felt overwhelmed battling with older children over homework and keeping the toddler occupied at the same time, I was grumpy and lost.
Several years ago I realised I needed to start earning to be valued and value myself and allow myself to let go of some of the self imposed domestic burden - I hate that that is how it was, but it was my reality. I got a job to allow me to justify outsourcing some of the childcare and housework - actually, being in paid work and outsourcing some of the kid stuff and house stuff is easier than being a sahm
My life is way easier now - getting a job meant I could pay for primary age kids to do homework club and send youngest to childcare and gave me the self belief to insist DH do more with the kids, and broach hiring a cleaner, because I no longer felt that I had to carry the whole domestic load and do it well to justify my existence because I didn't bring in cash to pay for shit.
Perhaps you need different antidepressants, other people have advice to give on that. However I'd also say you need to change your mindset. Those shiny women are outsourcing some of the stuff that gets you down, society values them and tells them they are contributing, they aren't home staring desolately at dust bunnies all day so they aren't tempted to dip into the fridge - it's easier for them to be shiny.
Getting a job outside the home might just give you the confidence and the cash you need to make your own life easier and raise your self esteem enough to take back your happiness.