NATO was founded to stop Communism from taking over the world, not to defend former Soviet republics from a non-Communist, nationalist Russia. In any case Putin’s barely been able to take 10% of Ukraine at the cost of being bogged down in a proxy war there. Ukraine has a large population and their own arms industry including tanks and jet aircraft. Americans never agreed to fight for Estonia and Ukraine. As for the original NATO countries, they refuse to do their share while surrendering their countries to Muslim hordes. NATO needs to either be reorganized and given realistic goals with members pulling their fair share, or disbanded in favor alliances with countries that take their own defense seriously.
Now NATO’s role is to facilitate Erdogan undoing the Battle of Vienna.