Watch and you'll see all sorts of things happening that shouldn't be possible in an economy with healthy amounts of competition.
An example that has been on my mind recently is dynamic pricing [0], where everyone is charged a different amount based upon what an algorithm thinks the company can get away with. When healthy competition exists, you can't just arbitrarily charge people more, because they'll just go buy from a competitor.
What does it mean when the things that happen in a healthy free market aren't happening?
I grew up listening to right-wing news radio, and one of the first things I learned in the realm of politics is that "our economy is great; offer quality goods and services at a competitive price and you will make a modest profit and grow and succeed". My political journey in the following decades is a tale of me seeing more and more that idea is false. The companies that truly shape our world first curry favor from those who already have wealth and power, and then focus on crushing competition and establishing a monopoly rather than making a profit; that's why these huge world-changing companies go a decade or more without ever making a profit--the news radio people never gave me an explanation for that.