When you're a state-sponsored monopoly the rules are a bit different whether you're a private entity or not. So it'll be interesting to see how this plays out.

(I know ICANN is not currently being sponsored by the US government anymore, but they were given their monopoly that way)

>all he has to do is create his own internet and a procedure for assigning DNS names and IP addresses

Or, y'know, just set up a copy of the DNS system using the existing software and standards for the existing Internet, but using different root servers.

DNS is well documented and open source for the most part, so it's not as if ICANN's control of the root servers means they can't be bypassed.

Or use one of the many alternative DNS that the market already created to solve this problem?

Continuously fixing ICANN’s decisions keeps alternatives from catching on.

Alternatives are meaningless unless they can get mainstream adoption from the software makers of the majority.

Exactly. It's a free market. Come on.

There is no free market. Just copyrights / patents alone show that. If I had invented something or way more likely came up with something obvious I should not be looking over my shoulder and waiting for some corporation to sue me for rounded corners or button placed on the form. Suddenly those big corps run crying to their daddy for protection.