Let me think carefully about this before I reply - I may spend some time reviewing your posts before I really reply, so I can do well. Hang in there! One thing that made it very hard for me was my wife's frustration being directed at me - my attepts at "niceness", which isn't the right word, were often met with low-grade hostility - made it tough to communicate, when she was angry all the time about something, but unable to define what.
I'll be back.