Which isn't meaningful when Magnora has his thumb on the scales of the primary debate: the one between the Alt-Right and the race-denialists

Seems like a false dichotomy to me.

I'm also on ruqqus and enjoy the site, but I've hidden a bunch of meme guilds that don't interest me. I wish there was more variance in opinions, as often people that disagree with the group consensus get downvoted. I feel like there is more open debate here, and not having downvotes plays a positive role in that. I don't frequent the sub, but there is /s/debatealtright which seems to fit what you're looking for. Personally I have no interest in staying in an echo chamber where everyone agrees with me.

Ultimately, I think free speech platforms will need to become decentralized, federated, and pseudo-anonymous to combat censorship by governments and cancelling by service providers.