4chan is what I associate with early 2000s internet. It hasn't changed. The only evolution being having newer, more popular insults, like autist, i guess.
We all called each other various slurs back then and the only reason you'd get mad or emotional over it is because you hadn't been on the internet for long enough. Or if you're getting rekt in a video game and they're rubbing it in, i guess.
The mainstream platforms that have appeared since only brought politically correct faux civility that hid the aggression behind a system of rules that has only made communication less genuine and more toxic. Strip away the identity behind a post and only the content remains. And that's why it works. It shuts down behaviours looking to cultivate a persona, which is bad for engagement, but good for content.