Sure while "Voat" is an alternative they're both centralized.

I'm meaning decentralized reddit.

Servers as subreddits, federated multi-reddits, only registered server accounts can vote on certain pieces, server by server moderation etc.

I had written a mostly functional system based around exchanging gpg-signed anonymous messages, usenet style a few years ago, with distributed voting, opt-in moderation, and server federation.

https://github.com/e1ven/tavern

I eventually moved on because I couldn't figure out how to solve some of the social problems, but I still think something like that could work out.

Do you have a document (or a set of issues) describing the social problems you were trying to solve? They may have already been solved, in some other context.