So you are suggesting we come to terms with our terms.
In 1/1 para. 3 you assert an equivalency between dictatorship and [absolute] monarchy, though this definition precludes the replacement of dictatorship with tyranny from the earlier post (I realize you indicated this, I'm just reiterating).  I'm unsure that monarchy tends toward dictatorship, especially in the European system.  Many African nations represent the transition from nascent democracy to strong-man dictatorships.  
As I noted above, I agree that pure forms are difficult to find and labels provide good sound-bites but poor strategic policy (long-term).
Re Bernie: He had more difficulty than simply his label.  The fear is more than just a democratic socialism - we see that in Europe; I think it has more to do with the curtailment of freedoms via tyrannical bureaucracy and Leonine-envisaged socialism.  In a pluralistic society (not the homogeneous one in which EU DS evolved), a tyrannical minority is a valid fear, IMHO.