KG,
really rushed but...
Just wanted to let you know how much it helps to hear that others have interactions like this.

I know just what you mean when you say:

"It is during interactions like this that I question everything, even my sanity. It's crazy-making. The fight continued last night. I was so bad, the grief was too much and I said many things, way too many..."

Round and round and round we go. There seems to be NO POINT trying to discuss things... but then, often H will come back with an apology a day or two later.
So maybe something does get through - who knows.

What I am sure about is how much it helps to hear the detail of such conversations from someone else - makes me realise that I'm not going crazy in this.

Mind you, I find it mind-boggling that our H's spout the same sort of stuff - almost verbatim.

Best, NLW