I can give Lucas a bit of slack for the lucklusterness of the PT and ROTJ, since he was ultimately just trying to make pulpy Flash Gordon-esque adventures, not high-art movies. ANH and ESB, however, were so good that they’re generally considered to have entered into the realm of high art. He then fell into a trap where his subsequent films were expected to be masterpieces as well, and I agree that he could have definitely done better on them. But since he really knocked it out of the park on his first 2 SW films, fans’ expectations were higher than his.
I agree 100%. It’s fair to have high expectations, but expecting every Star Wars movie to be a perfect, flawless work of art is unrealistic, and it’s exactly what a lot of fans don’t seem to understand. Star Wars is always beautiful, even when it has some flaws. If it didnt have flaws, there would be nothing to talk about, and places like this forum wouldn’t even exist.