/v/, /jp/, /pol/, and so many other boards are extremely toxic in behavior as well. There's some interesting stuff, but it's behind layers of "2edgy4u" behavior of people trying to out-insult each other.
Maybe it's just me - but I think the irreverent self-aware toxicity has it's advantages.
4chan's /b/ is seen as "the cesspool" and nobody tries to make it better because nobody wants it to be better. It just needs to be that place where the EMT that spent his day dealing with life and death can relieve his stress and let go of what's plaguing his mind with "lol, tits or gtfo"[1].
Because in the end, it's all a big joke.
1: Can't find back the exact screenshot were a /b/ user was saying this, sorry.