As crazy as it is, the somethingawful forums have remained relatively good (give or take) over the last 20 years. I semi-chalk it up to the fact that the average age of the forum users is around 30-35 years old.
The main thing that has kept SA high quality is the $10 registration fee. It sounds like a small amount but I get the impression that it filters out the vast majority of shitty trolls. On top of that, if your account gets banned then you have to pay the $10 fee again, so if you’re a repeat offender then it gets expensive fast.
I really don't think SA after around 2010-12 and before that period are the same. Vastly different communities inhabiting the same body. I was on site in 2003 and I despise what its become.