I really don't know what's up with him. We were playing Hearthstone or something like it a couple weeks ago, can't even remember for sure, and for whatever reason he was getting really pissed off (I assume he was mad at the game's rng, I can't say for certain but that's usually the case). He started hurling insults and getting super salty, so I tried to calm him down but it wasn't working. Rather than let matters escalate, knowing there was nothing I could say to him, I hung up. A few minutes pass and when I go to check if he's cooled off, I find out he's blocked me pretty much everywhere.
He gets pissy from time to time, it happens. He'll cool off eventually, but in the past it's taken him a couple months at most.