I am.often sobbing with my low mood symptoms
And I'm sorry, but you DO have MH issues - what you are describing there is depression. But it sounds like that is not allowed, as the only one allowed to have any sort of illness or problem is HIM. In fact, it's all about him isn't it? I would be, and was, depressed and anxious in your situation too.
As a PP said, you can't help someone who won't help themselves, and you need to save yourself and your children, only he can save himself.
I put up with my drinking, abusive ex "D"H for far longer that I should have because his doctor diagnosed 'depression', and I thought it was my duty to try and help him. Guess which one of us it was who ended up with PTSD, suicidal and close to being sectioned though? Who once locked all the windows then drove miles to throw it in the sea in case I decided to try and jump out one of the windows once the DC's were asleep (first time I've ever written or thought about that with no shame attached actually...)
Please look out for yourself, don't let it get to the stage I ended up at. You may think it's hard to walk away, but it's a lot easier than recovering from that sort of state. He is making you ill, and you need to get away, you can't help him, only yourself
. You need to stop making excuses for him and start getting bloody angry, once that happens you're on your way to finding the strength to get yourself away from him and such a toxic, horrible way of living. You and your children deserve to live in peace, not with all the shit and grief he is causing.