as far as I know Alec Guiness never hated Star Wars, otherwise he would never have done all three, moreso he resented the fact that after all his fine work and wondrous films he had made in a long and successful career, it would be a 2-bit science fiction film that he would be most remembered for, and in interviews he was only ever asked about Star Wars.

although I did hear that Peter Cushing never allowed his likeness to be used as an Action figure, so thats why there was never a Grand Moff Tarkin action figure until after his death.