I guess it's a bit of a weird one in that I'm not sure if there was ever any malice there. It always felt like he was reporting to us from a parallel universe, but there's always been the question in my mind if it's genuine or trolling. I guess we'll never know now. If he was a troll he's easily the best I've ever seen.
For what it's worth, so far as my memory goes there's been times when he'd, like... try? To troll. Usually alongside some varying degree of explicitly saying that was what he was doin'. Recall generally when attempting to make some other point. Caricature/parody stuff. Generally not malice, I don't think, but definitely occasional frustration that made a rough time getting the attempted point across all the more rough.
But otherwise I'm fairly sure it was mostly a tossup between genuine with an unusual way of looking at things and communication difficulty. If my memory's not going totally haywire I heard 'im talk a bit over voice chat a ways back, and it was both fairly in line with his manner of communication in letter and not giving any particular signs of being affected.
But by the same... goddamnit, I've forgot the word that goes here... whatever. By the same whatever, he also could never really seem to get much of a handle on getting better at communicating with folks, even when they tried to walk 'im through what was causing friction. Like boss toad says, failure to adjust and subsequent disturbance et al.