I quite enjoyed the show but season 4 was a massive turd that should be skipped.

In terms of the terminally online, yes, GamerGate was absolutely a critical point of radicalization of young males and the metastasis of far-right fascist thought. In the greater culture it was a blip, but it swayed a lot of guys who were previously either politically inactive or broadly liberal to pivot into misogyny and anti-woke conspiracy.

This isn’t particularly difficult to research – if you want primary sources it is, but there are a ton of video essays and other media exploring this exact phenomenon. For a perspective published as it was actively developing, I recommend this video by Folding Ideas.

It is and it isn’t. There’s a ton of tech waste and lots of people get rid of systems that are still quite capable. Obviously there’s less power but even a 6 year old gaming rig can still run most games, just at lower framerates