That sukks. Unfortunately, I am afraid that it is likely to get more difficult, before it gets easier.
If he wants to talk about the marriage, I don't think it's the worst thing in the world. However, he needs to be calm. If he wants to start ranting and raving, set your boundary. You can validate his feelings, let him know you will continue the convos when things are calm and leave the room. If he is calm, listen and validate. If he wants to know of something that you are uncertain of, let him know you'd like to think about it and get back to him.
He knows that he can cause you to be upset when he says certain things.
^^^THIS^^^
You are aware of this and aren't taking the bait. You are doing great. It is hard, but don't fuel his anger. Take some deep breaths. You got this.
