The thing is that anarchism fundamentally doesn't scale. There's a reason we see central authority arise in every functioning society regardless of its political system. It's the same reason complex animals evolve things like nervous systems and brains. Large organism need a way to coordinate actions towards a common purpose, and a human society is no different. This is why we see anarchist style societies at small scales, and then as they grow they develop central coordination mechanisms. The fact that anarchist can't wrap their heads around this simple concept is frankly depressing.