SIGH like at the end of the day, there is nothing a live action ATLA show could bring that we didn't get in the animation. Other than appealing to the most annoying parts of fandom who want to deprioritize Aang.

What you say to this

Let's debunk all the lies:

1 - "Kataang is one-sided" We literally hear Katara talk about how he gives her hope in the begining of EVERY SINGLE EPISODE, she canonically starts thinking of him as potential boyfriend instead of just a friend right in the middle of the first season (and after it we never see her having a crush on another boy like say Jet), the kiss on the cave at the start of season two is HER idea and she clearly enjoyed it, she is visibly upset when he's pulling away from her after Appa's kidnaping, her rage at his death is a clear parallel both to Tui and La as well as Oma and Shu, she is jealous when he's paying attention to other girls and flirting with him, she clearly liked the kiss during the Invasion even if she didn't see it coming, she threated to murder Zuko if he ever hurt Aang again, and even in the Ember Island fiasco she full on says to Aang that what her actress said about her only seeing him as a little brother is not true.

2 - "The age/maturity gap makes it weird" It's literally the same age gap as Zutara. It's TWO years, not twenty. Katara likes having fun and goofing around just as much as Aang does. Aang steps up and embraces his responsibilities just as much as she does when he discovers what the Fire Nation did to the world, and his people. Honestly, despite being older, Zuko is the least mature of all three - hell, 16-year-old Zuko is less mature than 13-year-old Zuko, which makes perfect sense because his abuse and banishment made him double down on all of his flaws, mainly his stubborness and tendency to lash out in rage.

3 - "They spent the second half of book 3 always fighting and disagreeing" They literally were only in conflict during The Southern Raiders, Ember Island Players, and then on the first episode of a four-part saga. Three episodes out TEN. Katara and Zuko meanwhile spent 5/6 of the entire series being enemies, AND she only forgave him when there was only ONE more episode left until the finale.

4 - "Zutara doesn't have any real red flags" Ya know, besides the fact that Zuko's nation and family commited genocide against Katara's people, and that he believed that was 100% okay, and that he chased her and her friends all over the world being openly hostile and violent, and he once hit her so hard it knocked her out cold, and he constantly calls her a peasant because he's very classist AND racist to the point of not recognizing her father's authority/status, and he attacked her when she offered to heal his uncle and then again in Ba Sing Se after she thought they had bonded, him helping Azula in battle was why she got to murder Katara's best friend and then he also sent an assasin after the Gaang to finish/repeat the job, and after all that he still felt entitled to her forgiveness after he was accepted into the group. Once again: this is why no one takes zutarians seriously. They love bragging about their ship being "complex and intriguing" then try to completely negate canon because for all their talk about "calling out abuse in Kataang/Maiko", they are, at their core, enablers.

5 - "Zutara was part of Ehasz's vision for book 4" No, it wasn't, and the man said so himself. He liked Mai and Maiko, and wrote lots of Kataang episodes. He has repeatedly let everyone know that the supposed interview in which he talks about how Bryke forced Kataang to happen at the last minute is FAKE.

6 - "We didn't get book 4 because Bryke wanted a movie" Bryke didn't really WANT the Shyamalan movie, but Nickelodeon, their bosses, wanted money. They literally walked out on the production because they were unhappy with it. They were OFFERED to make season four, but didn't feel it was necessary and stuck to three - and while I don't think that was the best choice, it still worked and it was a decision fully divorced from any movie deal or ship war.

7 - "People get angry at mention of zutara despite there being nothing wrong with the ship itself (besides not being canon)" Literally no one is obligated to like a ship just because YOU think it's perfect, and that kind of entitlement, the "I'm better/smarter than everyone else" complex, combined with all the lies, is exactly why people tend to hate the SHIPPERS and by extension the ship itself.

Admiting that zutara has always been pure fanon and that it isn't for everyone doesn't mean you have to stop liking it. Quit acting like a spoiled child, go enjoy your ship in peace, and respect other people's right to be indifferent to it or actively disliking it. Their personal preference is not a personal attack against you, stop treating it as such.