First of all, let me start by pointing out the following: the fact that the ending of a movie moves you to tears, doesn't make it WOW THE MOST AMAZING MOVIE OF ALL TIME.
I am a huge fan of the franchise but this movie was a huge let-down. I agree with the criticism I've already read on this page. Story underdeveloped, the villain extremely underwhelming... The whole movie is basically shown in the trailer. Sure, I had a tear in my eye when the dragons leave at the end, but hey, it's toothless and Hiccup... The hidden world only seems to be a few miles away from the island and is accessed through a simple waterfall and a cave. Why then can't the dragons just move there, safely out of the way, but come and visit sometimes? Why do they suddenly turn savage? Why does Toothless go away and just leave Hiccup behind, without saying goodbye, when last movie he would have given his own life to save him? Just a lot of loose ends and irregularities, really. Very dissappointing.
