so, why can't you sue them in your country?

If you are a citizen of another country doing business with Google it should follow that your country's courts have jurisdiction, if you're in the EU I imagine any EU country has jurisdiction (not because I imagine you are, but just as an example of how you might be able to pick a better jurisdiction - but that of course would be up to talking with a lawyer about)

If the amount is low enough you can sue them in small claims court in the US, which the amount is dependent on the state. Small claims court is geared more towards people self defending.

That's the mechanism that Youtube copyright claims should go through.