Socialism in general has a record of failure so blatant that only an intellectual could ignore or evade it.
Socialism sounds great. It has always sounded great. And it will probably always continue to sound great. It is only when you go beyond rhetoric, and start looking at hard facts, that socialism turns out to be a big disappointment, if not a disaster.
What socialism, fascism and other ideologies of the left have in common is an assumption that some very wise people—like themselves—need to take decisions out of the hands of lesser people, like the rest of us, and impose those decisions by government fiat.