It was just badly made... I watched 20 minutes through it and just stopped watching it because I couldn't watch it anymore. Sokka wasn't funny at all. They kept pronouncing "Aang" wrong and "avatar". It was just horrible and very disappointing
It's also no surprise that the directors of the anime (Michael Dante DiMartino & Bryan Konietzko) refused to comment about what they thought of the live-action. But there were some parts in the film of which I thought were awesome. I just think it went too quick.
It supposed to be a COMEDY! M. Night basically raped the source material...the fight scenes were predictable, the actors looked nothing like the original, the pacing was thrown all over the place, and what's worse: Why were the names changed? Overall, it was uninteresting and does not leave much to the imagination. But this is just my opinion.