I understand the intention but it's not necessarily a platform thing. Lemmy has the same type of people, just in smaller concentrations due to it being less used.
As an example, I was called a fucking moron, a nazi and told "Fuck you" over a simple discussion over graffiti by a real gem on Lemmy. Until his participation, nobody was hostile or angry and throughout equating me with a group of people that perpetuated the holocaust because I disagreed with his stance on something so innocuous, the group mods seem to be chill with it and apparently enough people also felt my stance put me in Nazi territory because he got some upvotes.
My point only being, there are terrible people on any platform that are incapable of having a discussion without becoming the lowest common denominator and the platforms (Lemmy included) generally won't feel the need to take action. It's just part of the charm of the internet. We could just as easily create a /c/ for Lemmy stuff that shouldn't be ok but is.