Unlimited PTO is fine. I've had it at 3 different companies for the last ~10 years with zero issues. It's toxic work culture that is the problem.
Oh right, it's not actually "unlimited" by any definition of the word because you'd be fired ten times over for taking all the year off.
1: and it is not likely you'll be rehired if you haven't done any work
Then in classicial logic, a contradiction can imply anything: https://en.m.wikipedia.org/wiki/Principle_of_explosion Therefore he can be fired 0,1,2,10,100,1000 times, with all those possibilities being true simultaneously.