Firstly I happen to like Lee and I think he is a very excellent ninja. However, it is a stated fact that he can't use ninjutsu at all. Now Naruto was only bad at Bunshin no jutsu and he failed because of that. Lee can't use any ninjutsus or genjutsus which were a requirement for passing the academy exams. I'm just saying that the fact that Lee became a genin without being able to use either ninjutsu or genjutsu doesn't fit with the story line that caused Naruto to fail the academy exam, which is a plot hole.
We all saw that Lee went through alot of hard times in his early training but so did Naruto and Naruto did learn to do kage bunshin before he was allowed to become a genin. Lee still can't do any ninjutsus or genjutsus. That is the contradiction, Naruto overcame his weakness Lee did not.
edit:Kagari-until there is some kind of reasoning behind Lee becoming a genin then everything that we are discussing is just theory. How is my theory that Kishimoto didn't consider every possible aspect of his storyline ignorant?