It sounds like he has some anger issues, and is dissatisfied with his life, and he's taking it out on you. He needs some kind of personal counseling, and you two should have some as a couple. That's if you want to work it out, and he's willing to do so. You can't make him talk to you and work on your problems as a couple, but you can try to convince him to seek help. If he's not willing, you may have to consider taking your kids and getting out of the marriage. If your kids see you just taking the crap he doles out, they may become abusers (and it is abuse) or seek abusers themselves.

I know it's a really hard situation to be in. I really wish you the best.