***SPOILERS**
Well lets see, Hal Jordan is a serious character, making Ryan Reynolds a poor choice since he's a comedic actor which annoyed comic book fans.
Hector Hammond is very confusing and completely irrelevant to the story as a whole, which many question why he was ever written in.
Other characters like hal's roommate or even blake lively are also pointless and add little to nothing to the story.
The use of his powers were somewhat disappointing, giant fist, race car track, nothing impressive or creative.
And of course the main villain parallax is......a big cloud..... and the climatic final battle is just getting pulled into the sun. The fate of the universe at stake, the green lantern corps powerless to stop anything, only hal jordan could have devised such an amazing ending.

That's most the hatred for the film, sure there were good points, Sinestro was perfectly done and could make for a great sequel, but that's hardly enough to save the film. And impressive special effects are obvious since the movie had a 200 million dollar budget. All in all there was just no excuse for it.

It`s not an opinion when someone saying green lantern and captain america is enjoyable movies, UNLESS you`re 10-11 years old, it`s just plain stupidity and great lack of understand movies.