In the fanfiction, if someone were to insult his dueling skills or question his abilities, that would probably make Zane mad. He takes his dueling very seriously and has a lot of pride in his skills. So any slights towards his dueling capabilities could set him off.
One possible reason could be that he was defending his reputation as a duelist. Maybe someone was spreading false rumors about his dueling skills or accusing him of cheating. In the competitive world of Yu - Gi - Oh in the fanfiction, a duelist's reputation is crucial.
Experimental cards might be a cause. Zane, being an adventurous duelist, might be testing out some new, untested cards. These cards could have unforeseen consequences and end up hurting him. For instance, a card that was supposed to boost his monster's attack but instead drains his own energy and causes him pain.
In the Yu - Gi - Oh fanfiction, when Zane gets stuck with Syrus, they might have an intense duel training session. Zane could be super strict with Syrus, pushing him to improve his dueling skills. Maybe Zane would share some of his top - secret dueling strategies that he's developed over the years.
Well, in this fanfiction, the plot might center around how Aster and Zane's relationship affects the dueling world. It could be that their love is a secret at first and they have to hide it while still competing at a high level. And then there could be a conflict when their relationship is discovered by other duelists or people in their lives.
One possible reason could be jealousy. Maybe Syrus is getting more attention in the fanfiction world, and Zane, being a proud character, doesn't like that. For example, if Syrus is praised for his skills while Zane feels overlooked, it can make him mad.
Maybe Zane gets mad because someone stole his special item. It could be a magical sword or a unique piece of technology in the fanfiction world.
It could be his rival. Rivals in Yu - Gi - Oh are always trying to one - up each other. If his rival manages to steal a rare card that Zane has been eyeing, or if the rival taunts Zane about a recent defeat, that would surely make Zane mad.
In a Yu - Gi - Oh GX fanfiction, Zane could be hurt because of his own over - confidence. He might attempt a really risky move in a duel, thinking he can handle it, but it backfires. This could lead to him getting injured, like his Duel Disk malfunctioning and giving him an electric shock. His pride would take a hit as well as his physical state.
His reputation among other duelists might take a hit. Some might see him as hot - headed or lacking self - control, which could make potential opponents underestimate him or be more hesitant to duel with him.
In the 'aittic gets zane mad' fanfiction, it might be that aittic competes with Zane in a very unfair way. For example, in a contest or a game, aittic cheats but makes it seem like Zane is the one at fault. This would make Zane angry as he values fairness. Also, aittic could be constantly criticizing Zane's work or ideas without any valid reasons, which would also lead to Zane getting mad.