These large dominating companies are monopolies in every sense of the word and need to be broken up. The Bell System was broken up and didn't have a tenth of the tracking and control of people's lives that Google and Facebook do. Ma Bell didn't actively harm its users and cause depression. Ma Bell didn't collude with Russia to influence a presidential election and install a puppet president.
https://en.wikipedia.org/wiki/Monopoly
https://academic.oup.com/aje/article/185/3/203/2915143 "Association of Facebook Use With Compromised Well-Being: A Longitudinal Study"