I think it's pretty clear he didn't mean to imply that all Japanese games suck, even if that's exactly what he said. I'm all for taking people at their word, but only to a point. It's also worth remembering that we all say something stupid once in a while, we just don't have a horde of angry people on the internet documenting it.
The bigger issue here is that so much of modern criticism involves making hyperbolic, blanket, and basically inaccurate statements. Nobody wants to hear "the pace of innovation in modern Japanese games is lower than it was 10 years ago", they want to hear "modern Japanese games are awful!" It's not just an issue in games -- I see this in discussions about movies, news, politics, and a host of other stuff. I see it in this thread, in which several people have said "yeah, I agree, Japanese games suck", which is as close to literally incorrect as an opinion can get.
This style of criticism is poisonous to intelligent discussion, and I'm bored as hell with it. An inability to present a nuanced opinion is, to me, basically a signifier of low intelligence, and I don't want to waste my time engaging with people who deal in absolutes.