Humans are spiteful, vainglorious, and greedy. To presume that a "stateless" society would work in a free-market paradise is to presume that the "stateless" society would work under the worker's paradise.
Which is why I quoted paragraph 2, where he specifically defines that it is in a per society basis, not a utopian one.
Specifically, "The anarchist doesn't deny that life might be better in society B. What the anarchist does claim is that, for any given population, the imposition of a coercive government will make things worse. The absence of a State is a necessary, but not sufficient, condition to achieve the free society."
What you're doing is completely ignoring that conditions "here" with a powerful state might very well be better by any objective measure than "there" without a state. That's the only reason you can use the term "free-market paradise".
No one who isn't trying to pull a fast one confuses "free-market" and "paradise".