It's called resentments. Until he learns to deal with them (getting sober) it will get worse. At this point in my life, all that matters to me is that I am working on my own recovery. Try to focus on you and stop trying to convince him of anything. Anything that takes the focus off your recovery isn't worth it. My AH would belabor things from 15 years ago. I once mentioned here he finally started blaming me for his awful childhood. He was willing to talk about anything except his drinking.
Good luck to you.