All of these countries were either Communist or dictatorships. None were socialist.
Dictatorships are not inherently non-socialist, but nor are they inherently fascist or communist, they can arise from any or none of these.
The distinction between a socialist state and a communist state is pretty thin as socialism is a transitory condition en route to communism. In practice, its a cosmetic difference in title, of no real significance to the wretched ordinary people living under those regimes. However, if you think it makes a difference -
USSR = Union of Soviet "SOCIALIST" Republics
Venezuela = Chavez imposed socialism and Maduro has continued these policies
Yugoslavia = Tito created the "SOCIALIST" Federal Republic of Yugoslavia
eastern Europe = former satellites of USSR - see above
China = see the
Constitution of the People's Republic of China:
Article 1
"The People’s Republic of China is a socialist state under the people’s democratic dictatorship led by the working class and based on the alliance of workers and peasants.
The socialist system is the basic system of the People’s Republic of China. Disruption of the socialist system by any organization or individual is prohibited."
Cuba = see The Constitution of the Republic of Cuba:
ARTICLE 1
"Cuba is a socialist State of workers, independent and sovereign, organized with all and for the good of all, as a united, democratic republic, for the enjoyment of political freedom, social justice, individual and collective welfare, and human solidarity."
North Korea = see the Socialist Constitution of the Democratic People's Republic of Korea:
Preamble:
"The Democratic People’s Republic of Korea is the socialist motherland of Juche where the ideas and leadership of the great leaders Comrade Kim Il Sung and Comrade Kim Jong Il are applied."
Cambodia = OK, maybe the Khmer Rouge were communists, not socialists.
Of course, we don't see lists of countries and first-hand testimonies where socialism has made life so much better for those citizens. Why is that?
While we do see clearly that the west - the US, the European countries, but we could include Japan in this - have become rich and healthy places to love because of capitalism.