You may be interested in the article Why do Marxists Fail to Bring the “Worker’s Paradise?” Marxists disagree with the idea that AES states are autocracies, while acknowledging that AES certainly isn’t a wonderland.

Additionally, Marxists don’t have an issue with hierarchy, but classes. The Marxist and Anarchist notions of the state are different, and as such judging AES by how well it advanced goals it never had is a bit silly.