It's a bullshit scale.  There is no authoritarian left vs authoritarian right.  The classical scale is only a single X axis where the further right you go progressing towards smaller scales of govt, the closer you get to 'anarchy', while the further left you go, the closer you get to authoritarianism, totalitarianism, marxism, fascism, and everything else which are all in the same group since they all require large govt.  That is not to say 'anarchy' is actually a good thing, anarchy just means abdicating power to whatever random passerby wants to seize it to then rule over you.