If the descentralization of social networks continue, we will have to prepare for the eventual rise of the instances wars, where people will start to fight about which instance is better and which one is weird to be in and so on, but that's for the future of us all.
I say we give each person one up or down vote on each piece of content. Then, people should be able to sort by the sum of those up or down votes (with up being worth +1 and down being worth -1).
I’m not sure, but I suspect a system like that might have content moderation built into its structure.