The fundamental flaw with microblogging is that people follow other people. Those people then spew a bunch of random posts on all sorts of topics. Very few people are consistently interesting, leading to a timeline / feed of random crap with a few nuggets of goodness scattered through it. This is unavoidable because of the person-follows-person architecture.

There are other pernicious effects that come from centering the individual. The narcissism, defensiveness, dunking are all enflamed, rewarded and promoted. Mastodon avoids some of this by not using a recommendation algorithm but the fundamental mistake of centering of the individual remains.

Also short-form content tends to be brainrot that destroys attention spans and reduces complex issues to bite-sized hand grenades to lob at The Other.