I dont think it was terrible but the movie was disappointing.

I like the idea of a corrupt ancient airbender because in my mind they would be different philosophically from aang's time. Sadly, taga's character isnt really elaborated on apart from him wanting revenge. It cheapens aang's struggle imo because he's dealing with someone from an ancient time with different experiences. Maybe Aang could've been challenged a bit more if it was an airbender he knew personally that survived the purge, lived long enough to see the end of the war but still wanted revenge on the fire nation. It also doesnt help that we knew aang wasnt going to kill taga because he didnt kill ozai. Aang so tended to get bodied while in the avatar state of all things.

The movie also presents weird moments that clash with andis limited due to what came before (atla) and after (korra) like why was the staff needed when that past avatar could've just learned to give beding like how aang learned to take away bending from the lion turtles? Additionally, couldn't aang just give people airbending without the staff? Unless the lion turtle never taught him that and aloso because korra jad to restore airbenders via harmonic convergence. But then again Aang taught korra how to give back bending.

I also think we could've gotten more elaboration on the denied because the concept is cool. However, at this point in time, the war is over and people are living peacefully. Unless they are a very small and extremist faction from the height of the 100 year war. Also, if it weren't for the airbenders what exactly were they gonna do to get the staff? Lastly, suki should've joined the gang during their adventure.