the scenery and atmosphere were really well done.
the plot, i mean, its hard to convert mythology to movies, because mythologies are kind of meant to be left to the imagination, and as a result naturally have a lot of plot holes people dont notice.
its easier to say "there was a great jedi anakin skywalker, who was turned to the darkside. he killed all his brothers, but would one day redeem himself, by killing the lord of darkness himself."
then to actually describe why the fuck anakin fell in the first place, give him a human face, and make 9 hours worth of movies out of "anakin skywalker turned to the darkside". because thats really what the trilogy was, in fan's eyes, just a big excuse to show why anakin fell to the darkside.
and you have this other shit going on, like jar jar, and jabba fett, mace window killing random clones... and its like, none of this is moving the plot forward, or has to do with why we wanted to see these movies.
this was all supposed to be these subplots, and padding that were going to culminate in this great experience of anakins turning, when, really, you could just watch the revenge of the sith, and have the same, or a better, experience than someone who didnt see the two other prequels.
because in episode 1 and 2, it was supposed to build up the relationships. but instead it just makes you confused, because hayden and portman are both autistic and have zero chemistry, and nothing in common, and it just makes you think anakin is kind of an asshole that was like, molested by padme when he was a teenager. and obi wan and anakin also have no chemistry. not to mention the clone wars and android wars have like, no effect on anakin psychologically, hes the same asshole before and after.
if anything the prequels just make you think, the reason anakin turned to the dark side is he was a dick, and he just did whatever he wanted, like a fucking dick. which could have been done in just revenge of the sith alone.