I’m guessing you aren’t an anarchist because that’s mostly about unjust hierarchies, not conflating the word authoritarian.
Socialism and capitalism is about who controls the means of production. In authoritarian countries that would usually be the state or ruling party making it no better than the bourgeoisie of a capitalist country and in socialist ones it would be the workers. I know of no country where the workers control the means of production. Workers having democratic control over the means of production is absolutely essential for socialism.