Yeah this is exactly what free market lunatics on the right don’t understand. Monopoly isn’t a free market. Free markets simply cannot exist without regulation to prevent unfair business practices.
Also any reasonable economist can tell you that the free market does not solve issues like the tragedy of the commons, because negative externalities are not factored in. It is also the government’s job to ‘internalize’ externalities so companies actually see the costs of, for example, polluting our air and water.