The problem I have with "The Free Market" is that it is a platonic ideal. Going a step further, the whole concept of a Free Market was developed before the advent of the Network Effect and the kind of economy we have today. As such, I think defenders of the Free Market do not have adequate tools to address the kind of "monopoly" that Facebook/Apple/Google enjoy today because of their business models. Free Market competition works great on a small to medium scale. The idea that you have some competitive advantage and can capitalize on that works wonderfully, but not for things like social media and companies with a market cap of over a trillion dollars.
18th century England had strict anti monopoly laws. For example canal owners could not operate their own boats. This type of centralization and monopoly acceptance came with railroads.