The issue is not so much that he’s “not a leftist” as it is his arrogance. He thinks his knowledge extends well beyond his very real skill at game development (the witness is a great game!). One example is his very confident takes on “lab leak” that have not held up.
(HN is also a very big fan of this hypothesis, without realizing it has gotten weaker with time. In their defense, I don’t think anyone wants to think about COVID anymore)
He's possibly the most arrogant person I've ever encountered in real life.
He thinks he's the foremost expert on basically any topic, from literature to politics, to science, to videogames etc.