I get that there are similarities, because capitalism came from feudalism. In feudalism the serfs were trading their labor for military safety provided by the king. The king got most of the resources from the serfs, but the serfs got something out of it too. While capitalism you are exchanging labor directly for money. Serfs generally had no ability to leave their kingdom. Under capitalism the employees can choose to quit and work for someone else. They could also start their own business. Starting your own kingdom wouldn’t have gone so well under feudalism.
That’s why capitalism and feudalism are two different words. They mean two different things.
There were absolutely freemen under Feudalism. And you were free in most places to start your own enterprise as long as you paid your taxes, Guild and King.
And the country thing doesn’t apply. The US wouldn’t let you start your own country either. We kind of fought an entire war over that.