Sasuke could be the cause. If Sasuke were to betray Naruto again in the fanfiction, it would surely make Naruto pissed off. Their relationship is complex and Sasuke's actions have a big impact on Naruto.
Sasuke could make Naruto pissed off if he goes back to his old ways of seeking power and revenge. Naruto has worked hard to bring Sasuke back to the right path, and if Sasuke strays again, it would surely anger Naruto.
A new, powerful and arrogant villain introduced in the fanfic could be the cause. This villain could constantly mock Naruto and his ideals, and try to undermine his efforts to protect the village. Such blatant disrespect would make Naruto really pissed off as he is very protective of his home and the values he stands for.
One common theme is revenge. When Naruto is pissed off, often he's seeking revenge against someone who has wronged him or his friends. For example, if Orochimaru did something to harm Sakura, Naruto would be pissed off and his revenge - driven actions would be the focus. Another theme could be self - discovery. His anger might lead him to discover new powers or a new side of himself. Like his anger might unlock a hidden bloodline limit that he didn't know about before.
Well, perhaps in this fanfiction, Naruto is somehow involved with the Young Justice team. Maybe they accidentally undermine one of Naruto's important missions or goals. For example, they could interfere in a battle where Naruto was about to achieve something crucial, like rescuing a friend or stopping a powerful enemy. This would surely piss Naruto off as he's very passionate about his friends and his village.
First, the author should stay true to Naruto's character. By studying his traits like his determination, his loyalty to his friends, and his never - give - up attitude in the original anime. For example, don't make him a coward when he's known for being brave. Second, improve the plot. Make it more logical and in line with the Naruto world. No sudden, out - of - the - blue events that don't fit. Third, work on the writing quality. Use proper grammar and spelling so that readers can easily follow Naruto's journey in the fanfic.
Maybe Naruto gets pissed off because his friends don't believe in him. For example, if they suspect him of being involved in something bad without evidence.
One possible scenario could be that Naruto gets pissed off when he discovers someone has been spreading false rumors about his friends in the fanfiction. This would really push his buttons as he values his friends highly.
I'm not sure of specific 'naruto pissed off fanfiction' titles off the top of my head. But you could also try joining Naruto - related fan communities on social media platforms or forums. People there often share and discuss interesting fanfictions. Maybe someone has already compiled a list of such stories where Naruto is pissed off. It could be due to a betrayal in the story, or some unfair treatment he receives from the Hidden Leaf Village elders.
Perhaps an outside force that manipulates the Young Justice team into going against Naruto. This could be a villain who wants to create chaos in Naruto's world. The Young Justice, being unaware of the manipulation, start acting in ways that piss Naruto off. In this case, the real antagonist is the behind - the - scenes villain, but the Young Justice members end up being the ones Naruto has to deal with directly, making them sort of antagonists in Naruto's perspective.