Many countries include 'Democratic' or 'People's' in their names, even though they are not democratic and do not serve their people. Examples: Democratic People's Republic of Korea Lao People's Democratic Republic People's Democratic Republic of Algeria Democratic Republic of the Congo And German Democratic Republic (East Side) in 1949–1990. None of these states are democratic, power and wealth are concentrated in the hands of a small ruling elite. Who are they fooling with these names?
Because revolutions are unreliable. A communist revolution happened, the revolutionaries were flying red flags and fighting to end the old order and bring in a communist utopia. But someone who wanted power and didn't care about the ideals took charge, probably murdered the communist leadership and set up an authoritarian government under the name given by the communist revolutionaries.
The people's republic of China is different - the communists won and named their country revolutionary style, but found themselves in charge of a massive high population empire. They became authoritarian to manage the country (because communism isn't able to manage even a small country)