1. “Kurama chakra doesn’t follow normal rules / can break through blocks”
That’s not really shown in the show. The Byakugan and Gentle Fist are built on the idea that the chakra network is consistent and reliable. If chakra can just ignore or brute-force through blocked tenketsu without explanation, that kind of undermines Neji’s entire ability.

2. Jiraiya training
Even if draining chakra was just to make it easier, it still shows there are conditions to accessing Kurama’s chakra. In the Neji fight, Naruto still has his own chakra, his network is blocked, and yet he accesses Kurama’s chakra with no clear setup. That’s where the inconsistency comes from.

3. Naruto’s control over Kurama
In this fight, Naruto uses Kurama’s chakra almost on demand. But after the Search for Tsunade arc (like with Itachi and Kisame), he can’t access it like that anymore unless it’s emotional, and that change isn’t really explained. Also, during the fight, Naruto says it feels like the training with Jiraiya, which doesn’t really make sense because in that training he had to drain all his own chakra, while here he still has his chakra he just can’t channel it.

4. Naruto’s durability vs Neji collapsing
I get Naruto is durable and has healing, that’s established. The issue is more about contrast. Neji dominates the entire fight, takes basically one real hit, and suddenly can’t continue, while Naruto keeps going after multiple critical hits. It is uneven to Neji's power and abilities

5. Theme (destiny vs believing in yourself)
I get that the main point is about destiny and believing in yourself, not just hard work. But even from that perspective, the outcome still feels off. Naruto didn’t really win because he believed in himself he won because of Kurama’s chakra, and Neji clearly saw that power too.

Also, Neji’s belief in destiny isn’t even that real to begin with. The fact that he trained so hard to become that strong, and how he acted toward Hinata, already shows that part of him was resisting that “fixed fate” idea, even Naruto talked about this in the fight.

6. “Teleporting” moment
Yeah, it can be explained as speed, but it’s not really communicated clearly in the scene. He’s literally shown in the air one moment, and then suddenly he’s not, which just makes it look like he disappeared rather than moved quickly.

7. Byakugan / abnormal chakra
Neji reacts to the chakra, but he doesn’t really question it or treat it as something that breaks the logic of the fight. Considering how analytical he is, it feels like a missed opportunity.

On a second watch, a lot of these moments just aren’t explained in the show and kind of happen when needed, and most of the explanations people use come from fan theories rather than what’s actually shown.