I agree. I think George Lucas had a good imagination, and he came up with a broad canvas that was suitable for many stories. But he was a terrible writer (the dialogue in his movies is painful) and he was a terrible director (the acting in his movies is awful). And he allowed others to totally debauch his source material. He made a ton of money. Good for him. But, as an artist, he has always been really, really bad.
What puzzles me about George Lucas is that he created both THX 1138, which to me is a sophisticated and tasteful piece of art, and the horrible Star Wars prequels. It’s like, how could the same guy make both of these?