I think even a world with slightly less psychos could have anarchy.

In a perfect world, yes. In the modern world, no. The vacuum of power is too quickly filled by those who hunger for dominance. This could be prevented by a powerful, intelligent and conscientious populace but we don't yet have that. Interestingly, "Bitcoin Jesus" is currently negotiating with several countries to buy $100Mn+ worth of land to start an anarchist state (Source 1). If he is successful, given the type of person that will be attracted to purchase land there, there is a chance that it could work out favorably.

Sources:

(1) http://www.zerohedge.com/news/2017-09-22/bitcoin-jesus-trying-create-sovereign-libertarian-utopia

Perfect world scenarios are pointless hypotheticals. If anarchy is perfection then de facto it must work in a perfect world or the world is not perfect. If anarchy is not perfection then why do we care that it works.

Anarchy as a political model in reality is unsustainable; because it is opposed to structure it cannot prevent the accumulation of power by individuals which produces states.

Anarchy as a personal practice in various forms does work. It's an applied philosophy, and so long as the person wants to live by it and it does so then it's working.