Karl Marx was never “in charge.” He developed a framework for analyzing Political Economy in a manner useful for the Proletariat to identify the manner in which we are exploited, and how we may go about defeating the Bourgeoisie. There are no rich oligarchs replacing Marx.

Belief systems certainly can be exploited, but that isn’t the point you are making here. Your point is that we should disregard analysis of Political Economy in favor of vibes-based action. If you don’t do the effort of studying Political Economy, any conclusions you come to will be based on shaky foundations, rather than throwing theory aside, we need to weild it to guide correct practice.

Funny enough, Mao described your error over half a century ago, in On Practice:

The second point is that knowledge needs to be deepened, that the perceptual stage of knowledge needs to be developed to the rational stage – this is the dialectics of the theory of knowledge.[5] To think that knowledge can stop at the lower, perceptual stage and that perceptual knowledge alone is reliable while rational knowledge is not, would be to repeat the historical error of “empiricism”. This theory errs in failing to understand that, although the data of perception reflect certain realities in the objective world (I am not speaking here of idealist empiricism which confines experience to so-called introspection), they are merely one-sided and superficial, reflecting things incompletely and not reflecting their essence. Fully to reflect a thing in its totality, to reflect its essence, to reflect its inherent laws, it is necessary through the exercise of thought to reconstruct the rich data of sense perception, discarding the dross and selecting the essential, eliminating the false and retaining the true, proceeding from the one to the other and from the outside to the inside, in order to form a system of concepts and theories – it is necessary to make a leap from perceptual to rational knowledge. Such reconstructed knowledge is not more empty or more unreliable; on the contrary, whatever has been scientifically reconstructed in the process of cognition, on the basis of practice, reflects objective reality, as Lenin said, more deeply, more truly, more fully. As against this, vulgar “practical men” respect experience but despise theory, and therefore cannot have a comprehensive view of an entire objective process, lack clear direction and long-range perspective, and are complacent over occasional successes and glimpses of the truth. If such persons direct a revolution, they will lead it up a blind alley.

Lemmy is developed by Communists, the Communists were here first.

Secondly, the dissolution of the USSR was driven instead by numerous complex factors:

1. Liberal reforms that gave the Bourgeoisie power over key industries

2. A firm dedication to planning by hand even as the economy grew more complex and computers too slow to be adapted to the planning mechanisms

3. A huge portion of resources were spent on maintaining millitary parity with the US in order to dissuade US invasion

4. 80% of the combat done in World War II was on the Eastern Front, and 20 million Soviets lost their lives, with no real economic support from the West in rebuilding despite taking the largest cost of war

5. An enclosed, heavily sanctioned economy relied on internal resource gathering, closed off from the world market

Countries like the PRC have taken to heart what happened in the USSR. As an example, the PRC shifted to a more classically Marxist economy, focusing on public ownership of only the large firms and key industries, and relying on markets to develop out of private ownership. This keeps them in touch with the global economy without giving the bourgeoisie control of key industries, and thus the bourgeoisie has no power over the economy or the state.

People left the DDR after getting good educations for free, and higher wages in West Germany. They got the best of both worlds.

Millions were not sent to Siberia.

Cuba is a resilliant success story given its brutal embargo and sanctions, yes. It has astounding metrics in areas like life expectancy despite being intentionally impoverished by the US Empire.

Private is controlled by large corporations, and often gets state funding. All press has bias. Really, you don’t have anything against the data other than you feel like it could be wrong.

Read the book.

Stalin ‘planned to send a million troops to stop Hitler if Britain and France agreed pact’

As if they were ever going to.

The Cold War & Its Origins, Vol. I, Denna F. Flemming, 1961, Chapter V:

Final Procrastination. This explicit warning did not increase the tempo in London. It was not until July 31 that Chamberlain finally announced the naming of a military mission to Moscow, to arrange the concrete terms of the proposed alliance. Molotov had named his top military men to negotiate, but instead of Lord Gort and General Gamelin the British-French delegation was headed by an obscure British Admiral, Sir Reginald Plunkett-Ernle-Erle-Drax, and by a French General of comparable obscurity. Nor did this mission fly to Moscow as fast as planes could take it, to concert measures with desperate speed against the pitiable crucifixion of Poland which was boiling up on the horizon. While the sands were running out for Poland by the minute, the Allied mission took a slow Baltic boat, on August 5, and did not reach Moscow until August 11. Then it transpired, once again, that these men had no power to conclude an agreement.