Korra has a deeply unsympathetic look at power of both herself as the avatar and the people that comprise the systems, just like AtLA. But in AtLA the simplicity of the narrative Good people are good even if they act bad sometimes, is replaced with there are not a lot of good people. This also happens in the YA novels, Kyoshi and Yangchen have wonderful internal politics and intrigue that would have eaten Aang alive.
Korra has a deeply unsympathetic look at power of both herself as the avatar and the people that comprise the systems, just like AtLA. But in AtLA the simplicity of the narrative Good people are good even if they act bad sometimes, is replaced with there are not a lot of good people. This also happens in the YA novels, Kyoshi and Yangchen have wonderful internal politics and intrigue that would have eaten Aang alive.