It's an often told myth that Guiness disliked Star Wars. As a friend of his said after Alec's death, Star Wars gave him security in life and he was not about to turn around and bite that hand.
What distressed Alec was the over-zealous attitudes of fans towards him- especially as, as a serious actor, he had a ton of other stuff he wanted the average person to remember him for as well, several of which he liked more, from Bridge on the River Kwai, to Tinker, Tailor, Solider, Spy. The oft-told legend- tricky to tell it is true or not- is the one when the fan comes asking for his autograph, saying he was seen Star Wars dozens of times, Alec says he will give the autograph, so long as said fan never watches Star Wars again.
True or not, it is thematically relevant, but people take it as evidence he didn't like Star Wars, where as, as I say, it was the fans that got to him.