As good a place as any to drop this, speaking of books:
I'm about 60% into it. The book covers Facebook, Twitter, Youtube, Whatsapp, e.t.c. It also details the history of Silicon Valley and how many of the issues encountered are repeated due to the insularity and hubris within that group of executives and start ups. I very highly recommend this book. Will give you pause before continuing to even venture onto those platforms, for sure. But will also give plenty of insight into many of the issues we complain about there. Polarization, easily believing obvious falsehoods, e.t.c. It is more than just "dubm people congregate." The algorithims themselves continually drive and influence, and the end game is engagement. Unfortunately, and this is my opinion at this point, it comes down to money. So in the long run we'll lose.
But it will give you insight into the history, and issues, involving how we as a society have very intentionally been re-wired.
NYT review.