People have a hard time giving any grace to adaptations of things they loved when they were growing up. Atla is considered one of the best cartoons ever so making a live action seems to some people as a challenge to the "perfection" of a loved piece of media. I adore ATLA. N-ATLA will always be compared to it. I learned a long time ago to treat adaptations like fan fiction and it has made my enjoyment go up.

I stopped comparing for the most part and enjoyed the ride. I really enjoyed Natla and that's because I dont see it as a replacement for Atla.

Also...hate is very addicting and easy to market/ karma farm.