“Hit piece” is an accusation of unfairness, unbalanced reporting. Not about something being unflattering but true.
I have no opinion about this movie.
I have no opinion about this movie.
I said it's a "hit piece", not a hit piece. And I gave a definition for what I meant in the very next sentences. Because, obviously, the traditional definition is one that is going to be subjective and silly and not worth discussing. But the idea of documentary filmaking having opinion and perspective is important, nonetheless.