On a serious note I think the problem is actually the heavy moderation and algorithmic bubble creation. Then you had certain famous and controversial people who operated above all bubbles and the different bubble started clashing.
The only way I see to fix this is if the "middle" is one bubble. And no, that's not a middle ground fallacy, I dont think the middle position is the correct one but rather that a strong middle bubble is required to separate the majority from extremist bubbles.
Unfortunately a middle bubble required people to be tolerant. But many people lost the concept of disagreeing but supporting that someone should be able voice their opinion anyway. Musk actually understand this so I'm not overly optimistic but I'm curious to see what he will do.