Mark Zuckerberg may not have wished for any of that. But by rewiring everything in a headlong rush for growth—with a naive conception of human psychology, little understanding of the intricacy of institutions, and no concern for external costs imposed on society—Facebook, Twitter, YouTube, and a few other large platforms unwittingly dissolved the mortar of trust, belief in institutions, and shared stories that had held a large and diverse secular democracy together.
Read the whole piece. It explains very well why everything seems so broken.