Ancap does not allow murder, but ancap also doesn't protect patents and trademarks, so from stage one a monopoly can't form. In some perspective it can.

Although for the record I don’t hate anarcho capitalism, I just think it’s more of an ideal. A more realistic but comparable system would include a government to protect union rights and prevent oligarchical behaviors while still being mostly hands off on an industry with a Union, letting the union enforce safety and related guidelines.

This is what just a bit under half of ancaps think.

Almost all other ancaps want panarchy, which is more or less the same, but involves a central entity to prevent outright mass violence, while all other functionality is under exterritorial jurisdictions under it.

There's a negligible minority of complete idealists.