Lucas should have picked Johnathan Brandis as Anakin

Actors to Lucas might as well have a word balloon over their heads. The whole Star Wars vibe is that it's basically a living, breathing SCI-FI comic book.

The visual element and music carry the Star Wars experience, and the characters are secondary according to Lucas. This is the Star Wars style, sometimes done more than at other times (AOTC as one extreme, Empire as the other).

Having said that...this dialogue together with some of the acting still manages to strike false notes, and at the end of the day, only McDairmid, Ford, and Lee are the ones who REALLY shine with the material they're given.

...hard to blame the actors.

Or the director.

Again, its the CHARACTER that you have a problem with. (I'm assuming that we are still talking about Hayden in EP2 and 3?)

George perfectly directed Hayden to play the character the way that George wanted him to be,....

and Hayden perfectly portrayed him the way that George wanted him to be.

You just wanted Anakin/Vader to be someone else than George says he is.