SM, what a horrible day for you - very difficult.
I don't mean a magic wand solution, where you H suddenly becomes warm and supportive and calm, I mean what would help you 'get your bravers on'? TBH, it sounds as if there are 3 options: 1.Your DH enters some kind of counselling programme, immediately, which helps him deal with his anger, negativity, control-freakery and (probably) deprssion. 2. You find the kind of external support you need in order to make a pro-active decision to leave him - maybe counselling by yourself, or a committment from a freind to be 'on your side' and a listening ear throughout, or 3.There is a crisis, perhaps violence to you or the kids, or a deterioration in your little boy's happiness and self-esteem, that tips you over into sudden flight.
The other option is that you continue like this until you have the strength to do none of these things, and yours and the kids lives sink into perpetual misery.
I don't think you do sound pathetic, but i think you need the support to enable you to think clearly about what you want, and how you can get it. Rickman was posting that it is a year since she split with her ex - hook up with her on a thread?
I do wish you good luck, and my heart goes out to you, and I hope you will be 'happy and relaxed mummy' soon.