"I just wanted to play video games, why couldn't you leave me alone?"
The culture of a lot of redditors and internet trolls in general seems to be that they feel like they are the eternal punching bag of society. They were the punching bag in high school, they didn't get into a good school (or go to college at all), and now they're the punching bag of society as "incels" or "white males" or whatever, and I think what you're seeing here in a big way is them fighting back.
A comedian named Tim Dillon somewhat accidentally NAILED the sentiment here: https://www.youtube.com/watch?v=-0pgEWcq_YQ (NSFW language).