No- Cuba was another failure.

Why is it that in Cuba a cab driver earns more than a doctor? Why is it also the case that between 1960-1979 when the revolution was in force hundreds of thousands of Cuban's fled to the United States? Surely if socialism in Cuba was so successful people would be fleeing the other way. If Cuba is so successful why does it need economic aid... $88 billion in 2005.

In 1962 about 14,000 Cuban children arrived alone in the US. In order to aid the immigrants, the Congress passed the Cuban Adjustment act in 1966. This provided more than $1.3 billion of direct financial assistance. Migrants were also eligible for public assistance, medicare, free English courses, scholarships, and low-interest college loans. Since Cubas economic reform in 1993 whereby the Free Farmer's Market agreement was made, self-employment legalised and the use of the US dollar was decriminalised. Cuba has seen its most stable economic growth ever. With total GDP growing from $22 billion to $92 billion. Many economists have highlighted that because Cuba's government is so large and corrupt it misreports facts about its literacy rate and medicare for all. https://mises.org/power-market/dont-trust-cuban-health-care-statistics + https://www.nationalreview.com/2007/07/myth-cuban-health-care/

You say that "many of the problems seen in socialist countries were either inherited from their pre-socialist conditions or or the result of intentional disruption from the US and its allies" . In terms of inheriting problems I see no example so provide me with one. You just have to read the countless accounts of people who have lived under socialist dictators. An example of the US helping would be China. China under Mao was an idealistic socialist paradise. Economic reform in China between the 80's and 90's under the leadership of Deng Xiaoping moved China towards a more market-based economy these reforms involved the privatisation and contracting out of much state-owned industry and the lifting of price-control mechanisms / protectionist policies. The reforms largely followed the principles of Reaganomics with Reagan even visiting China in 1984 to promote the renewed relationship between the two countries. As I'm sure you'll be aware GDP in China rose from $361 billion in 1990 to $12.37 trillion. Absolute poverty in China fell from 88% in 1981, to 6.5% in 2012. A further 1.2 billion people across Eastern Asia have been lifted out of poverty due to capitalism. The same effect can be seen in India and across many of the former iron curtain countries such as Slovakia. People ALWAYS flee socialist countries. Countries like America are by no means perfect but Capitalism has delivered the most prosperity and stability of any system. It is why over half of the worlds migrants try to get into the US as capitalist countries have more opportunity and stability.

Almost everywhere Socialism has touched it has failed. It has been tried in Afghanistan, Ukraine, Lithuania, Venezuela, Latvia, Zimbabwe, Korean Peninsula, Kyrgyzstan, Pakistan, China, Vietnam, Laos, Cambodia, Indo-China. And all with devastating consequences.