So this is just a coincidence?

In regards to the USSR, it’s probably the most complex example, but if you don’t think there was plenty of pressure on Russia from the West that wasn’t direct warfare (cold war as an incredibly basic example). Here’s a fun video on reasons why it fell that isn’t through a US centric lens

China is also complicated an I’m not going to speak to it.

But North Korea? You mean the country we absolutely turned to rubble through bombing campaigns to destroy ~85% of it’s buildings, and then on top of it cutting them off from most of the rest of the world from trade? That’s probably the most prime example of how we’ve trampled a country. Blowback has a deep dive into the history there and it’s great.

And here’s a holistic video in case you care to hear the exact argument broken down

If I try to grow some tomatoes, and by the time they’re sprouting out of the ground, my neighbor tramples them and lights them on fire, does that mean that I can’t ever grow tomatoes and they’re doomed to fail?

It’s hard to when any of those experiments have been met with bombs, embargoes, coups, and other fuckery

Common ownership of the means of production

You do realize most of the other attempts at something else have been largely destroyed or stifled by the United States on behalf of capitalist interests right? Map for context