So liberal democracies promised universal rights and utopia. Instead each Liberal state produced between 100 and 150 years of abject poverty, massive wars, and domestic repression of labor movements with the military or paramilitary police.
Communism promised universal rights and utopia. Instead they produced about 10 - 30 years of major famines and poverty and displacement and then after that initial period eliminated abject poverty while speed running industrialization without creating a class of robber barons that ran the government.
Fascism was defeated in its objective of destroying the world's first workers' state. The US and UK supported the rise of the Third Reich and Germany fielded the most powerful military ever fielded at that time. The USSR lost 7M people fighting all the way across Europe to sack Berlin and end the Nazi project. And for that, they will never be forgiven.