Social media is doing everything in the establishment’s favor
For about half a second, people used social media to organize. Then the fascists saw how to manipulate and control it, and jumped at the opportunity. At this point social media – especially corporate controlled social media – is just part of the fascist apparatus.
To a lesser extent, as this article talks about, the coping mechanism of posting allows you to vent enough to prevent you from having the discomfort necessary to actually do anything. It’s not nearly as harmful, but it’s not good either.