It's not about intelligence. It's about emotion. Greed and a desire for power over others is what corrupts any attempt at textbook Communism. The only way Communism could work is by it being run by an emotionless AI.
You're missing a key element. But of course YOU think YOU'RE smart enough to implement Communism. YOU'RE way will be the way that works, right. But when in doubt just refer to the meme.