It's extremely difficult to start up any kind of national corporation anymore. A tremendous amount of initial capital is required, then there are all the endless regulations from innumerable government agencies at various levels that must be complied with, not to mention all the "affirmative action" and "diversity" requirements. Coming up with a brand new product, or a more efficient way to market and distribute an existing product, are about the only ways to hit it really big in business in the U.S.
What kind of money would it take to start up a rival to ESPN, or a new pro sports league, or a new automobile company? Billions. . . it's the same way most people get shut out of a serious chance to succeed in politics -- first they must get vetted by the party establishment, which rejects or isolates them if they don't toe the ideological line sufficiently, then they must have access to millions of dollars, sometimes tens of millions of dollars.
Free enterprise was long ago conquered by monopoly capitalism, which also makes sure Americans are fed Cultural Marxist nonsense every day in every way.