I don't really get it.
He's made two well received games, now a third one and an entire programming language, and anytime I tune in to his content he seems like a competent programmer with the kinds of opinions you'd expect from any kind of craftsman: sharp and borne out of their own personal experience. I never hear anything that strikes me as inflammatory.
What's there to fuss about? If you disagree with one of those opinions, great!
Maybe this is just what experiencing the world solely through the internet does to people. Makes them prickly and uncalibrated.