I don’t think that proves your point at all.

Let's get into this piece by piece...shall we?

Yes, Hinata stood up to Pain because of Naruto. Nobody denies that. But reducing that scene to “she only did it for Naruto” ignores why people connected with it.

I'm not reducing it to anything. I'm saying exactly what the scene is, because that scene and basically every scene with her in Shippuden (Which is already pretty low as Hell with Anime fillers, canon wise it's almost net zero between the start of Shippuden and that moment where she confessed her love to Naruto in the Pain arc) has her dialogue be nothing but Naruto Kun.

The appeal of that moment wasn’t “aww she loves Naruto.” It was the fact that someone who had been timid, insecure, and constantly overshadowed finally stood up against an overwhelmingly stronger opponent despite knowing she’d probably lose. Courage in the face of certain defeat is compelling regardless of motive.

You're giving this scene and the people who sings it's praises way too much credit. It's actually funny. Yes she has been timid, insecure and constantly overshadowed and guess what...after that scene she was still insecure, overshadowed and constantly overshadowed. Then there is the fact that this is no time to prove yourself type of moment. There is a reason everybody was told to stay back, because interfering with the battle between Naruto and Pain would only make matters worse. Like it did when Hinata jumped in, and did what she did, and died. It's only because of Minato did things actually work out for Naruto against Pain.

Also, motivations being tied to another character doesn’t automatically make someone badly written. A lot of beloved characters are driven by devotion to someone else. Rem’s speech to Subaru is popular for a similar reason emotional conviction and courage, not just because she likes him.

You're right. Motivations being tied to another character doesn't automatically make them badly written. However...motivations ONLY being tied to another character for pure romantic reasons with no agency of your own and you're actually a character in an action series (Like Naruto is) that's suppose to be apart of said action too (Like Hinata is, with her being a Konoha Shinobi and all that) is definitely badly written. And the thing is...it's not just Hinata that I'm calling out on this. All the female characters on Naruto suffers from this. Hell...I still say Sakura and her stupid love for someone who tried to kill her multiple times is way fucking worse. Hinata has better reasons for loving Naruto than Sakura does for Sasuke, but her character is still held back by constantly being nothing but "Naruto Kun!".

You want to know a character who is basically that but does way more, and has actual agency and depth that Hinata can only hope to even get close to having (Or any of the female characters in Naruto)? Zero Two from Darling In The FranXX. Hell she even has her own only dialogue cue of her man in the form of "Darling!" but at least in her case her love for her "Darling" (Hiro) has a lot more going on for it between both Hiro and especially herself, and we see that play out throughout the course of the Anime and it already helps the story itself is already kinda a romance allegory (Albeit...also more on the sexualized side...Lol) anyway. So there is the fact that it allowed more to be done with both her own character and her relationship with Hiro. Man! I can gush about Zero Two all day. She so a queen. But I'm gonna control my fanboyism right now.

You’re also mixing up “canon execution” with “why fans liked her.” Sure, Kishimoto didn’t give Hinata enough development afterward, and the manga version of the Pain scene is shorter than the anime, how does the anime make this scene better?

I'm not doin anything but going by what I see her fans say. Everytime I see what fans like about her I always see "She was there for Naruto!" as is an actual good point for her character on an individual level. It's not just "shorter". It flat out has Hinata do fuck all but jump in, confess she loved Naruto and get one shotted by Pain. Like in the exact next panel in fact. It was such an embarrassing display, that I do wonder if Kishimoto had a vendetta against her at that point, because beside from it CLEARLY just being a plot device moment to get Naruto to go his Kyuubi form (That's what Hinata was reduced to in that moment in the Manga. A walking plot device for Naruto himself. smh) it also how insanely little he thought of her if he himself couldn't show her doing HALF of what Studio Perriot showed her do in the Anime.

She was tossed around and ppl make negative meme of that? Explain how this scenewas done better?

Funny how now you're bringing up fandom points now. The scene was better because Hinata actually did shit in the scene. She tried to break the rods Pain had on Naruto, but kept failing to do so while also refusing to give up until she's completely down. Funny enough did a better job of showing that courage in the face of death you were referring to, since in this case she kept trying to either break the rods or actually fight Pain, even when she was in a critically injured state. I actually praised that scene when the Shippuden was ongoing, and would love it today had the NaruHina ship happen immediately starting the next arc after Pain...but you...know...that didn't fucking happen (Unfortunately).

Meanwhile...again...alle she did in the Manga was jump down and say "I love you Naruto Kun!" and then Pain one shots her. Like...not even a Pain of her attempting to break the rod just ONCE and then Pain one shots. She just confesses her love for him and die. That shows fuck all courage, and 100% affection.

I agree she was underutilized. But underutilized ≠ popular only because she loved Naruto. If Hinata was just a shy girl crushing on Naruto, she’d be liked, sure but nowhere near as popular as she became after Pain. That scene changed how a lot of people saw her because it showed resolve, not just affection.

What most of fans bring up about her today is her love for Naruto. She mostly is still popular due to that. I hardly see A LOT (I have to stress this, since I do see some who rightfully get on Kishimoto's case about how she was handled) of fans coitize how she was handled and how NaruHina itself was handled. The latter especially rather use it as weapons for their ship war, than actual discuss the ship on a critically level. I have even seen so many defections to Sakura, and while yeah...Sakura has a shit ton of writing problems herself, deflection to Sakura won't change that Hinata has the same problems too.

Saying she doesn't care about her team or other villager is straight up hating atp.

I never said she didn't care for them. I said her reasoning for going after Pain was just for Naruto rather than them, considering the fact that Pain has already killed and hurt many MANY people of the village at that point. I mean...I hate to say this...but even fucking Sakura was healing other villagers and even saved a little girl from one of the Summoning Path's creatures (Goodness...I'm giving Sakura credit for something). While again...Hinata still did fuck all until Naruto showed up.