i think you don't get it, it's one of the best things from the new trilogy, and a whole new point of perspective how tho threat a Sith and a Villain in SW.
He is not a Villain... just a kid who wants to be as good villain as his grand father was, and he failed, now the interesting point is to see his progress and how he is going to grow up.
In fact, from the beginning of the movie i thought about him just as a darth Vader clon, until i discovered he was not, and he turned out to be a very interesting character.
i think maybe we are going a bit offtopic,,, sorry for that
I do 'get it'. Character growth, the internal conflict, yada yada... I thought KR came across as a whiny little bitch, instead of a fear inspiring villain.