What is "authoritarianism" as a method of government? I mean that quite literally. What is empirically true about socialist states that makes them worthy of dismissal, in the structure of their governments? The reason I described "tankies" as such is because this is something both "tankies" and non-"tankies" can agree "tankies" do. It's a group of people that support existing socialist states, and the group that does not support existing socialist states uses the word as a pejorative to attack them.
And no, I don't think you're trolling, but I am not either. I am a communist, I support existing socialist states, as do the Cubans, Black Panthers, etc.