The entire argument is structured around corporations/monopolies ONLY existing if government subsidies them. So to win this argument, I only need one example to prove that a monopoly/corporation came into existence without a subsidy.
There is no evidence that corporations would exist without government granted privilege because there are no examples of corporations existing without government granted privilege.
Microsoft.
Intellectual property law is a subsidy for Microsoft's business model of selling copies of a non-scarce resource.
This is of course on top of the government's recognition of Microsoft as some special entity that can do things individuals or groups of unrecognized individuals cannot.