It's the NFL's product, they can do whatever they want with it.
People are certainly free to start another league or not watch it. It isn't as if the NFL is required to live life or anything.
He shouldn't be going after the NFL.
That's the simple answer - it's the NFL's product and they can do with it as they see fit. The fact is that it's being carried on airwaves for which access is granted by the federal government, and the league has been given an antitrust law exemption to allow them to do certain things to make their "product" as marketable as possible. Add to that all the public financing of stadiums that's gone on in the last 10 years, from which the league has directly benefitted, and it's easy to see that this is not such an easy answer.
I presume that the league could decide not to air their games at all, and that would be perfectly fine, but because of the unique nature of this "product" and the ways in which the league benefits from governmental intervention or lack thereof, there is an argument to be made here that these monopolistic practices are illegal.
Lets do that and we'll call it the ....XFL!!!