Of course, everything subjective but just because she's not a fan favourite doesn't mean she's not an expertly written character. She's incredibly popular and loved by tumblr, reddit etc. It's the teen demographic expecting shonen hero qualities like the people here do for Naruto that don't respect her as much. Seen the words 'stupid feminist icon' , 'complains' and 'too headstrong' used against her....as if....that's not all done purposely as her character develops. It's the stereotypical manbeard and teenage boy demographics who start the slamming at cons.
People forget Aang had the same thing in the early days too. Up until mid-Book 2 he can be extremely irritable, I never had a problem personally but it made a lot of people feel alienated, feeling like they're watching an exclusively kids show. Of course, we later know this to not be true as when he loses Appa and comes to terms with killing the Firelord that he's capable of mature emotion too- but without that early immaturity you don't have the character development.
yea its not just NB korra has many critiques across the board and was overall less liked(kotaku, forbes being a few i remember) where as aang was the face of western animation at one point and still is. ATLA is mainly a kids show, aang was not that irritable the show won many awards in the beginning and he was liked ever since ppl saw how he lost his whole race was wiped out and his early story got ppl hooked on him.
she is not expertly written she literally forgets what she learned every other season, overestimates herself a lot and until season 4 she doesn't learn some of her major flaws from previous seasons. she is continously stubborn and is rebellious it gets old, and she made so many self inficted mistakes due to it. ppl love strong characters like toph and katara but korra was way more annoying and im not only one who thinks it scores of articles from decent sources had that complaint. she has a reset in every new season where she goes back to being almost exactly the same character until season 4. And her relationships in this show are absolutely toxic, they make the show cringeworthy there is a reason why so many fans dropped out and was one of biggest flaws in season 1. The villains are truly the best part of this show.
its annoying when kids like katara in ATLA have more emotional intelligence and continually grow and dont generally revert but this was the biggest flaw with korra.
the writers pandered a lot too i dont want to spoil some parts but the last scenes was nothing more than that. and idk why but comedy went downhill in LOK. sokka by himself better than all of LOK together.
dont get me wrong overall its still one of the best american animations but compared to ATLA it was a step down its nothing to do with korra being a girl but just the way this show was executed.