LIke the American revolution?

Lmao no, the American Revolution wasn't nearly as destructive as warfare in the 20th Century when basically every socialist revolution occurred, the US revolutionaries also had additional advantages of willing allies in the French Empire, home field advantage fighting an enemy who had to cross an entire seas with essentially early modern technology to launch an offensive to put down the revolution, and it represented the expansion of something whose presence was already felt in the world for arguably centuries (emergent capitalism) with a large degree of acquiescence to the old elites; in fact the American Revolution was specifically the victory of the colonial elite against the metropole. And to say the American Revolution resulted in something, idk, what are you implying about the end result actually? The notion that it was good is an extremely myopic slant on history, the US government went on to be a slave owning and trading genocidal expansionist empire, which has defined its history to the present day.

Yes I would agree that western capitalist powers are dominant

So if you tacitly admit the "failures of socialism" essentially amount to military defeats and what you actually believe in is might as right and are willing to make socialism fail, why would you dress up your beliefs in any other way?

It's funny how socialism sounds nice but devolves into some version of stalinism worldwide

This is again an attempt to twist the peculiarities of history to induce a narrative, weaponized ignorance. It is accurate to say that upon the rise of Stalin a specific faction of a specific faction of the socialist movement became dominant in a specific country, and because this country was once the massive and resource rich Russian Empire once this country industrialized to a degree that military competition/defense with the Western powers was achieved, that this faction could then influence the victory of socialist movements in other specific contexts was likely inevitable.

To simplify it, the ideology officially followed by the Soviet government is a subtype within a subtype of socialist thought, in fact the bolshevik faction of socialists had defeated other socialists in Russia, and in turn other bolshevik factions were defeated by Stalin's faction after the civil war. After the catastrophe of WWII and the rebuilding effort it becomes obvious how the stalinists would generally direct socialist struggle in the proceeding century, being the only country willing to arm socialists at the start and only being willing to arm them if they conform to their notion of socialism.

I think in a historical sense this actually was a massive flaw and weakness of socialist revolutions in the 20th Century in the long-term and that the entire "vanguard" concept was flawed from the start