Huffman has always been a narcissist, and notoriously thin-skinned when it comes to people challenging him - the fact he'd go in and edit other users comments critical of him speaks volumes as to both his sensitivity to criticism and the levels to which he'll stoop. I think these tendencies and Reddit's slow turn towards autocracy were exacerbated with the Tencent investment, and has only accelerated as the site attempts to become profitable.