OP: I was you. I left 1 year ago, its been hard but so worth it. He still has the kids and he is still at times critical, but on the whole he is much better with them. My kids never complain about going there, they have said they let the criticism ride over them more now, because they see me doing that now. Its not ideal, but if we stayed together they would have it 24/7. They do love their Dad, but he was also emotionally abusive to me (which is what he is doing to you). 1 year out, and we still have episodes like today. They definately have a better relationship with both of us. My house is calm and as positive as I can be, I give them heaps of love and encouragement. I am conscious not to over compensate and you know we have the ocassional moment. My eldest (10 now) was heartbroken for about a month, then he realises now why, and he tells me he thinks I was right to leave. He is very very emotionally smart. The youngest is 6 and his confidence has grown massively. We have a rescue dog, we live in a much smaller rented place, but i can't tell you how much more me I am.
So 2 days ago, he told me he wanted nothing to do with me and he couldn't stand me, and not to reply to him as I always like to have the final word. How perfect I must feel, blah blah blah.
Then he sent me a very polite email asking if I would go view a house he has seen with him (WTF!!), so I was polite, but clear. If he wanted me to I would go see the house (the kids have to stay there after all), and agreed with some other stuff he said.
He replied, saying that it hasn't been easy for him, and its hard for him to say it, but he knows its been hard on both of us.
I didn't reply as I didn't see it. 2 hours later he sent me a shitty email, about how I never acknowledge his feelings.
See how fucked up that it? Even 1 year later he still behaves in the same way to me as he did before. For your mental health, make plans.