The problem with Korra is that in the original Avatar, the villains (Azula, Zuko, Ozai) were all people with motivation and reason behind their actions. They never dulled it out, and when Zuko changed sides you believed he would do it because he had a reason to. That took 3 seasons of him chasing the avatar, it wasn't some mid-season switch.
In Korra all the villains are killed off quick and are never brought to their full potential. For a show that should teach kids that brute force isn't the way to solve complicated political issues, the show sure loves using brute force to take down difficult political issues.
The fact that anti-bender sentiment seems to disappear after Season 1 is shocking to me, because it had a legitimate reason to exist, and was a very interesting take on the world of avatar. But no, Amon was a waterbender, woo, what a shocker. I guess everybody loves benders now because their leader was one, nobody seemed to give a fuck about the message.
How about season 2, instead of finding a clever way to resolve the conflict, our heroes L I T T E R A L L Y murder everybody in their way. RIP boom boom girl, I imagine she gave great head when she still had one.
Season 3 is the worst, because Kuvira did literally nothing wrong. Her motivation was just, her actions were pure, and everything 'wrong' about her is said about things you never see. Prison / extermination camps are described by a bunch of fleeing criminals who are running from the law. She has a nuke, oh no, not like America does either. What a waste of a perfectly good premise.