Hardcore gamer = someone who plays only cinematic grizzed white dude games and/or military fetishizing FPS
Casual gamer = anyone that is not a 15-25 yo male, and/or plays anything outside of the previously mentioned games, especially if those games are colorful.
So basically the gaming community is full of gatekeeping, misogyny, toxic masculinity and general chuddery. They make sure they're the loudest voice heard when anything about games is talked about, and won't be happy until all games a homogenous stream of bland, hyper-realistic but with a grey filter slog of mindless action with no heart or soul. And don't you dare force them to read any dialogue or story.
A lot of them didn't even get that even the early Duke Nukem games were already mocking this shit as immature misogynist garbage. Which is how we got the dumbster fire that was DN Forever.
Randy Pitchford has always been a piece of shit but a big part of it was not getting what made the Duke Nukem franchise funny and instead doing what he thought was funny in DNF, which was some really fucked up sadistic stuff that basically had a rimshot sound after it was presented.