Is anarcho capitalism an oxymoron? If there is private land ownership, a stateless society is impossible. The landowners would be, by definition, the states. No matter how many or few of them exist.
The “state” is in the state of your mind. One can break free from the notion of this state. An analogy: movement. People were sold the idea of owning a car to gain movement advantage. Nowadays, you can “ride”. One is free from the shackles of the “state of owning the object called car that is tagged with a dozen more costs”. There are many other examples, in painting the one who broke free from the normal set rules preceding it, broke free from the “state”.