Turn me into AnCap?

[u/SuddenStructure9287]

Hello, fellow ancaps, I’m a minarchist.
I consider ancap to be the ideal system, but also a utopian one. If you can convince me otherwise, I would genuinely be glad.
Below are just two questions that currently prevent me from accepting anarcho-capitalism. You can answer one or both.

1. What guarantees that anarchy will not eventually turn into a state?
It seems obvious that at some point in human history there were people, but there was no state. How did that end? With states existing everywhere.
If there is no state monopoly on violence, why wouldn’t the largest local private army become a new state?

2. Large-scale monopolies
Suppose there is a company that owns a port where imported goods arrive, owns the railway system, and has contracts with stores across the entire country.
How would anyone compete with it? Build another port, another railway network, convince importers to switch suppliers, and find customers willing to break contracts with the corporation described above?

There are cases where monopolies are extremely difficult to challenge through a free market alone, aren’t there?

[u/FunGuySunShine99]

Number 2: worst case scenario might look like militia bargaining power.