That and sith are naturally deprived beings that are an absolute to the exclusion of everything else; Sidious was exceedingly cruel and chose to exercise that whenever possible and was argubly the most greedy of all sith lords, Vader was this bubbling mass of equal parts loathing and calculated wraith, Dooku was entirely consumed by his pride to the extent that he was unable to see himself as a pawn in the grand scheme e.g. Each Dark sider was an absolute upon themselves that became only capable of observing whether someone was of use to their personal cause or not; they had ceased to become a fully functioning person, yet through their narrow vision they achieved great personal power and cruelty to make decisions without any consideration of ethics or prior allegiance. That is what it means to be a sith, to fall into a state of depravity. E.g. A sith can only deal in absolutes. Padme wasn't with Annie, so he condemned her to die in agony as just another inconvenience that apposed him, there was no mercy granted to her due to their past relations that would have swayed a person less resolved and deprived
In term of grammer and scripting it could be tighter; but I had no problem getting the message when I was in theatre. Quite honestly; as amusing as the phrase might be after a lot of anal dissection, it did serve a purpose quite effectively; to just dismiss it as bad writing is akin to dismissing the entire saga as bad writing, as Star Wars and cheesy scripts go hand in hand.
Edited by LordBritishFor clarification on Dooku