I think that anarcho-capitalism, and to a lesser degree even libertarianism, is a fundamentally flawed philosophy because of it being against hierarchies that "suppress" their followers and in support of hierarchies that bolster them. In other words capital owners down playing the state and propping up "free market economics".
There's much changed since the inception but the core idea of anarchism is abolishing central powers (and single truth) in favor of their own homemade belief system where government has no power over them and can't enforce their laws, because, hey, they're (anarchists) moved away from main stream.