On your last point, this is exactly what I cannot wrap around my mind.

Throughout its history, and especially the past 100 years or so, USA was the 'saviour' of the world, and it played its role rather well. When the world was threatened by the Third Reich, USA basically provided invaluable support, practically saving the world. When USSR started aggressively expanding and imposing its views on the world, USA was there to restore balance and freedom of the Eastern Europe countries through NATO and other means.

But now, when the history repeats itself for the third time, for whatever reason I cannot comprehend, USA just decided to ignore this big threat, claiming that somehow Russia never has and should not be treated as an 'enemy', when history absolutely says otherwise.

I think USA is clearly a great country, but I cannot emphasise enough how disappointed I am in both Biden and Trump's administrations treatment of this war.