Vader from original trilogy is epitome of supercool cold blooded villain. He's the villain of villains. There is nothing in the entire universe that could in any way affect his balance, throw him off target or make him nervous. He's Clint Eastwood and Charles Bronson of the space age western multiplied by a hundred. If you stand in his way. You die. If you slow him down. You die. In the same stoic, cold manner. He doesn't rush through battlefields, he doesn't run through duels. He doesn't get hit by shots, he doesn't bleed from sabre wounds. No Jedi can kill him through the entire saga, it takes his master and dark force to finally finish him off in almost natural "imbalance of the force" kind of way. No extreme temperatures, blasts, explosions, lasers or bullets affect his pace and stop his systematic determination. His heartbeat indicated on the chest panel almost never speeds up. His breath under cold, black, emotionless mask almost never changes. To the last moments of his (by the timeline of original trilogy standards almost timeless) existence, up until he sees his son dying Vader has no emotion and no mercy. And that's what makes the scene unforgettable (by 1980ies standards at least).
And then grandpa Lucas goes on another power trip and changes ultimate dark villain into retarded teenager who dropped iphone into portapotty and now repeatedly screams "Nooooooooo!" "Nooooooooooooooooo!!!!" echoing behind plastic door. It's like a FUUUUUUU guy meme transplanted onto home cinema screen.
, if ever there was an example of how bad a director the guy is, it's Eps I/II/III.
