Well, those that entered the EU are now far better off by all the metrics that count, and you can take your pick from GDP, income or life expectancy. This didn't happen for all the countries under USSR, depending on whether they stayed within Russia's influence. Obviously, when you have Russia invading a country or threatening to invade, that country won't do well. But even in countries left out of the EU, such as the Republic of Moldova, you can see progress and a strong opposition to regional Russian influence. And Russia does what Russia always did. But it's pretty telling that Eastern European countries like Poland or Romania now have a higher GDP per capita than Russia, lower poverty and higher quality of life included.
In defense of the US, I will say that the Marshall Plan has rebuilt Western Europe after WW2, while USSR's response, the Molotov Plan, was designed for extracting resources. And that Pax Americana did the West, at least, a lot of good is an understatement. ALAS, it appears that world is ending, helped in no small part by the changing views of western citizens, “informed” by the Internet, and guess what will happen next.
Anyway, it's baffling to me to see such a changing tide in opinions on HN, now that the US administration has changed. I mean, I've seen stupid opinions denying reality on HN before, but now it's on a whole new level. I get it, we had cancel culture and all that, but such opinions don't change overnight, so I'm amazed at how many uneducated cowards the world has, even on HN.