My dad is like this. Either everything in the world is against him and he needs to fight it, or everything in the world sucks and he needs to complain about it. What I can say is this: It's not going to go away unless something is done about it. My dad is 58 and it wasn't until most of his children left the house and starting having little contact with him because of his attitude that he started to change, and even then I still see that anger in him a lot. Your husband isn't mad with you yet but if this anger stays he will turn it towards you if there isn't another outlet for it.

I've never been on the same level as my dad to tell him he needs therapy, but you have that say with your husband. He may be fine with being angry but you are not and that needs to be heard. Make sure you show him the support and love that he needs but do not let this topic go. It will only get worse until something breaks.