Interesting that you want something that is specifically not just a reddit knock off. I actually think that a Reddit knock off focussed on discussion (say, like hacker news, but with subreddits) would do well.
This comment isn't using these labels incorrectly - the people on most of the alternatives post blatantly anti-Semitic and/or legitimately racist content (not ambiguously or twitter-classified racism, but full-on, hard-R et al, good old fashioned racism), anti-vaxxer mobs, doxxing, calls to violence, etc.
And yes, much of the time this sort of content is the majority.
I don't mind people having whatever views or even irrational and harmful biases, as long as they don't shoehorn them into everything they say. I'm happy to have an interesting discussion with someone who stays on topic and says interesting things, it doesn't matter to me (right then) if I wouldn't think much of other aspects of their life. You don't have to "bring your whole self" to hn or new-reddit or wherever else.