Not a movie, but it's moving. Zuko/Iroh stole the show just like Book 1 of the animation, Lu Ten's funeral legit made me cry. Yet it gets tons of hate!
I'm a huge Avatar fan, but few fandoms put the original on the pedestal as much as ours, and it's only gotten worse with time. I feel like Korra got the same treatment, as I'm a massive Korra fan and I don't understand how so much of the fandom treats it like garbage.
I think that both Korra and Netflix's Avatar deserve a lot of criticism (Netflix more so than Korra), but it's definitely overblown in many parts. Korra has a lot of good sides, those rarely get mentioned alongside the bad ones.
Season one had some problems trying to find its place, but that's also pretty common for a lot of shows. Season three had serious pacing issues due to the writers' strike. I'd be interested in seeing what season 2 criticism is like.
Season 2 has slow episodes. For instance, 2-5 are not great, IMO.
But there's more fundamental "it's not totally the show's fault" criticism too, like the awful video quality/artifacts (even on the blu-rays), and the general maturity level and jokes. And TBH Zuko/Iroh kinda carried the show for me until Toph shows up, I didn't feel connected to the early gang like I instantly did to Zuko and Korra.