Why is the left pushing the idea of socialism/comunism so much even tho it showed that it doesn't work many times in the past?
Socialism makes sure not to give power in hands of private players and large players who contribute to GDP of the nation. While any government wont want that , socialism also makes sure to keep price under control , handle inflation and related unemployment. It also protects the people of the country by safegaurding land and labor laws.
Everything you said is incorrect.
The dictator is a large player, especially the ruling class.
Socialist countries tend to have enormous amounts of inflation, look at Venezuela for example
My country was a part of socialist ex Yugoslavia which also issued million Dinar bills and had 2000% inflation rates.
They only hide the unemployment by hiring people in non-existing positions that aren't actually needed.
They expropriate land from the people.