While he comes off as a jerk, and possibly is one, I can understand the sentiment, having spent a few years of my life among ethnically Chinese people in Asia. There is this drive and aspiration to be recognized by leading brands in the West as equals, perhaps even betters. Due to a history of subservience and shame and a strong nationalistic current seeking to undo that.
This game is one of the most ambitious and accomplished to come out of China and they’re hungering for that kind of recognition. So it is likely that fans of the game feel it was ‘stolen’ from them and he seems to be responding to that sentiment. To us it looks petty, but to some of the game’s most ardent Chinese fans this may have been an appropriate response. Not sure how this was received in China though, just speculating.