@SleepyCatten The moment Korra loses all her bending and is left with nothing but air, the element she's the worst at and takes concerted effort to be a fraction as good as her teacher's children was such a moment. Really makes you wonder what it'd be like for Korra to have to live like that. An Avatar who has lost the thing that makes the Avatar special. Hell, even if they spent the follow up season with her regaining her lost abilities...
But no. So frustrating.
@mdstevens0612 I always felt like Korra was constantly pushing her up against the impossible, and even leaving her seemingly permanently scarred after the events of the season 3 finale, and how she copes with it in season 4.
But yeah: Korra could have been even better without the constant fear of cancellation hanging over its head each season.