Sure, the US element of NATO could in theory easily defeat Russia. But politically it's a non-starter. Biden dithered and prevaricate, Trump and his thuggish cronies are so pro-Putin that they've already made it clear the USA is in effect no longer part of NATO. So that leaves the Europeans, who (i) can't use any weapon system that has US components because the USA has a veto, and (ii) are so denuded of capacity that they'd collapse within 48 hours of high-intensity fighting. It's no good saying "NATO has X and Y capabilities" when NATO no longer exists to any meaningful degree. Russia wins by default despite its catastrophic inadequacies, corruption, and ineptitude. We simply lay down and let the stupid little Tzar walk all over us.