it's been almost impossible to find a fanfic with this concept, it doesn't have to be a bunch of content I just want them to react to the kisses and maybe "why would I choose cosmic energy over katara" and the fact that they start a family, I can't get enough of these two

I'm also a part of the Facebook group for Avatar The last Airbender and I'm so sick of hearing the comparison between Avatar, The last Airbender and Korra. Just to preface this, I enjoy both shows, but people keep saying that the reason we like Avatar The last Airbender more than the legend of Korra is simply because of nostalgia and that's not the case....

Here's my two cents...

The Nature of Their Mistakes ​The comparison between Aang's and Korra's mistakes isn't quite a one-to-one. ​Aang's Mistake: Aang's "fumble" was made when he was a scared 12-year-old child who had just been told he was the Avatar and was about to be separated from his mentor and home. He ran away from a responsibility he wasn't ready for. The entire narrative of Avatar: The Last Airbender is his journey of atonement and growth to fix that single, pre-series mistake. The audience forgives him because the story frames it as a child's understandable fear, and his entire arc is about making things right. ​Korra's Mistakes: Korra begins her journey as a powerful, confident teenager who has already mastered three elements and embraces her title. Her mistakes—siding with Tarrlok, opening the spirit portals, and ultimately losing the connection to her past lives—are made while she is an active, fully-realized Avatar. These aren't errors of a scared child in the past; they are misjudgments with massive, world-altering consequences that happen in the present. The loss of the past Avatars, for example, wasn't just a "stumble"; it was a permanent erasure of the series' core lore, which many viewers found to be a jarring and destructive plot point, regardless of Korra's role in it. ​The criticism isn't that Korra makes mistakes, but that the scale and permanence of her mistakes are fundamentally different and, to some, detrimental to the world-building. ​Narrative Structure vs. Character Bias ​Your point about nostalgia and rigid thinking is a factor, but it doesn't account for critiques of the show's actual writing and structure. ​Cohesive Saga vs. Seasonal Arcs: ATLA is a single, cohesive 61-episode story about ending a 100-year war. Every action builds towards a clear, final goal. LOK, by contrast, was initially planned as a miniseries and then extended, resulting in four distinct seasons, each with its own self-contained antagonist and political issue (anti-bending populism, spiritual chaos, anarchism, fascism). While this reflects "modern politics," some viewers found the seasonal structure felt disjointed and rushed compared to the epic, long-form storytelling of the original.
​Writing Critiques Beyond Bias: Many common criticisms of LOK have little to do with comparing Korra to Aang. They often focus on: ​Plot Resolutions: Some major plot points, like Korra regaining her bending from Aang's spirit in Season 1 or becoming a giant spirit to fight Unalaq in Season 2, are criticized as deus ex machina moments that feel unearned. ​Supporting Cast: While Korra's personal journey is compelling, the development of her "Team Avatar" (Mako, Bolin, and Asami) is often viewed as less consistent and emotionally resonant than that of the original "Gaang." ​The "Moronic President": Using Zaheer's line as proof of nuanced political commentary is tricky. Many would argue that President Raiko being portrayed as a simplistic, "moronic" politician is an example of the show's sometimes shallow approach to the complex political ideas it introduced. ​In short, it's not that the criticism of Korra is baseless; it's that it stems from judging the show on its own terms its pacing, its plot devices, and its handling of the world's loreand finding it lacking in areas where its predecessor excelled. Dismissing these points as simple nostalgia oversimplifies a complex and legitimate critical discussion.

There is a million other reasons I could describe of why I like Avatar of The last Airbender more But these are the main reasons I feel why Korra is necessarily worse so to say.