Communism has nothing to do with resource misallocation. That’s a thing that some communist governments did, as did democratic governments and theocratic governments. Your comment is really doing exactly what the person in OP’s hypothetical did. It’s really not surprising that a populist takeover by mob rule did not instantly create an efficient system of communist government- that doesn’t mean it’s impossible to work out an effective system of communist government. That means they were too impatient to gradually work out a system that would actually improve the circumstance for everyone involved.