The key problem is that his economic analysis is absolute trash. I used to think he was just totally incompetent at it, but given the bias in the errors, it is pretty clearly intentional deception. But it's often pretty hard to address that, because every article he writes is a 10k word gish gallop. I've tried debunking key points a few times in HN comments for just one of the intentional mistakes he makes, and people complain about the reply being too long.