H has a big personal problem. This 1992 crap is crap. His real anger is probably more directed at himself than you, but as long as you allow him to spew it at you, he will, because it is much easier than working on his real issues.
You need to set a boundary here:
"H, you are either going to make significant progress on this 1992 crap or I am outta this M."
When he brings it up when you are talking about something else: "H, we can talk about that later, for now let us stay focused on the current topic."
