Normally left and right are about socialism vs capitalism, and all states are “authoritarian,” including socialist democracies, in that all states are the political arm of the ruling class, be that class capitalists or workers. A socialist state is “authoritarian” against capitalists, while being democratic for the working class, and left-wing. Until we erase the basis for the state, ie until we collectivize production so as to erase class, there will be a state and thus “authoritarianism,” so it’s better for the working class to be in charge.