I’m sure this has been asked before, so sorry if it was.
But from my very surface level understanding of this, communism is about workers collectively owning the means of production. If a dictator is controlling the means, do the workers really own them? To me it just seems like centralised capitalism.
to add, the point of Rojavas and “centralized” military forces - this is where syndicalists tend to find their strongest justifications, in having built in systems of military federation that are demonstrably effective without making it super incentivized to do power centralization.