And those are the key words in your review. But what about looking at it not as an adaptation but instead as a movie by itself?
Movies can be looked at in so many different ways. Even the worst (least acclaimed) movies can be enjoyed as 'guilty pleasures.'
I regard X-1 as the best in all ways. As an X-Men movie - and as a movie.
There is suspense in the story, great emotional drama at the end, great chemistry between Rogue and Wolverine. We clearly feel for Rogue's plight and her death and revival in that machine. Do we feel the same for the kidnapped children, for missing Scott and Xavier, in X2? Nope.
To be honest, I don't see why people have orgasms over X2. It's a rather quirky character drama (which happens to feature the X-Men). The theme is less clear than X1. X1 was clearly a socio-political sci-fi drama with government discrimination/persecution (the registration act) at the heart of it and two different sides (Xavier/Magneto) representing the Malcolm X/Luther King viewpoints.
X2 is about the X-Men versus a rather embittered general whose own son is a mutant - it's not about society, it's about one lunatic. His bitterness over mutants is to some extent justified - his own wife killed herself because of her son's illusions. What is this movie telling us? That lunatics exist? Well, I knew that.
In X2, Stryker took the role of X1's Magneto as the villain out to change things to suit his needs... but who took the role of society/government? Not Stryker, as he was very much a lone operative, a maverick. Bobby's parents are the only representation of a wider theme (typical parents, typical society reaction to something different). Maybe Stryker also represents bigotry taken to an extreme... but it is an extreme. The registration act was shelved and never mentioned ever again!
As a story, what is X2 telling us? The story is the bottom line here, not the visuals or cinematography or production designs. A movie must be judged by its narrative content.
One thing X3 did do quite nicely was in showing the world of mutants out there, and the reactions of society and government. Although X3 did present it all in a very right-wing way (mutation is an abnormality that can be fixed, changing one's essential nature to fit in is fine and can even be forced on you).
I guess the three movies can be summed up as:
X1 - mutants exist
X2 - mutants have the right to exist
X3 - mutants have the right to choose whether they exist