All I needed to see was a clip of Aang saying, out loud, in the first episode, "but I'm just a kid who likes playing games and eating food and hanging out with my friends! I can't fight the fire nation!" Like. The Netflix show has exactly the same runtime as the first season of the anime. There is no reason why they couldn't have just shown us Aang being a kid and hanging out with his friends instead of telling us, unless they only wanted to save that runtime for flashy CGI fight scenes.

That and instead of Katara opening the series with her famous "water, earth, fire, air" monologue, the show has their grandma recite it word for word directly to Aang's face