Aside from videogames, choose your own adventure (cyoa like on r/makeyourchoice) prompts are also pretty rife with shitty things. Aside from the excessive sexualization of women, there are also several instances where authors enforce a gender binary and heteronormative romance.
In a subculture based on customization and choice.
Miniatures games. Sexism is a problem (cheesecake models all over the place in some games, and people get weirdly defensive if you critique it at all).
People get weird and difficult sometimes about certain cost savings measures (such as people 3D printing their models or getting recasts of models, often from China which I think sometimes adds an element of racism to how their “concerns” get expressed) that create an unnecessary barrier for entry that keeps out poorer nerds.
Also sometimes you see people involved with certain games (really just one, but it’s the big one, 40K) who will unironically cheer for fictional, satirical space-fascists.
Games also take place mostly in LGS’s (local game stores/shops) which can have all the problems associated with comic book shops (often they’re the same places, honestly), in terms of shitty nerds making people feel unwelcome.
EDIT: Also I’m being a massive poser here as I tend to go in and out of doing hobby stuff on and off depending on life circumstances and was just about to start doing stuff again when “being in a small room 4 feet away from another person for 2-3 hours straight, with another pair of people 4 feet to your left” became a really dumb idea, so it’s been a while.
Printing or otherwise substituting cards/minis is based, and ip law can consume my entire dick and balls
Yeah, /r/Sigmarxism is pretty cool and has had a lot of pro printing/recasting discussion recently.