Point 1 is a dubious complaint. There are other companies with significant presence in "advertising, eyeballs on screens, and proprietary data". Facebook is far from having a monopoly on this. Furthermore, it is far from clear what demonstrable consumer harm is taking place as a result of this "uncomfortable level of power".

To point 2: monopolistic behavior resulted in consumer harm and clear negative impacts on the wider economy. The original laws have been reinterpreted for a variety of modern cases (see - antitrust case against Microsoft).