What is the explanation for polarization in the post-pandemic era?

The polarized world has finally come to Taiwan in the post-epidemic era, especially at this moment when everyone uses social platforms/media to express their most honest words. The same is true, dialogue is necessary, but these may have to build a large platform that is appropriate to the appropriate reason and law before it can start. It's a pity that the most well-known social platform of Internet celebrities so far has not been able to serve everyone. Maybe it's because everyone doesn't understand it enough, right? Not everyone is like the troubled academics in the field of communication, who are trying to figure out how to understand (social) media every day.