I feel like 75% of Mastodon are people talking about Linux. If you don’t care about Linux you feel alienated. I enjoy Mastodon and Lemmy, but the lack of more diverse subjects gets to me if I browse for too long.
Update: I took your advice and purchased a laptop for Linux, and now I care about it! Problem solved.
There’s a few specific gaming communities. They’re small, but I can say growing daily. I’m actually a mod of !satisfactory@lemmy.world for example. If one doesn’t exist and you feel up to it, make a community too. I’m sure there are people who are interested. The communities are small, but through nurturing we can grow them up to a nice size.
Check out https://lemmyverse.net/communities, I don’t know how many are active but it only takes one person to make it active!