Reddit’s fatal flaw is that subreddit mods are volunteers. Sometimes this works well when you get a knowledgable, benevolent individual in the position, but more often than not you get people who want to power trip.

Mods should be in-house, on payroll, and strictly bound to the network’s standards.

This should generally be less of an issue anyway in a system that actively penalizes the sorts of crudely expressed, un-nuanced posts that are typically social media’s bread and butter. Not being able to appeal to basal emotions (“it feels right” is a poor metric) and being required to substantiate views more intelligently takes the air out of a lot of fringe sails.