This means that every member state effectively has a veto it can use to block core EU policy, like sending billions of euros to a war-torn country or letting a country into the club.
Yeah, it is not like a single Senator like Manchin could influence the policies of the whole Biden administration. The US is immune to renegade politicians.
That is simply not true. If you drive through a country you have to adhere to that countries standards, no matter where you or your truck are from.