Five Reasons Why Team Seven Broke Before It Began
1.
Hatake Kakashi saw ghosts.
It was just a pity he didn't see past these ghosts till Sasuke's neck burned beneath his master's power and Naruto was dragging a Toad Sennin to the nearest Ramen stand.
2.
Sakura loved Sasuke.
It was about the only thing Naruto never forgave Sasuke for. Gennin teams were supposed to be family and even Naruto found it hard to accept the fact he would always be second in everything he'd ever wanted.
3.
Naruto said surprisingly little for being so loud.
It wasn't till he was half-way across the continent that anyone realized how little he had ever shared with anyone. For a boy who was quite willing to give his life for his comrades he was remarkably unwilling to share overmuch of the burdens that shadowed him.
4.
Sakura didn't know what it meant to fight.
She was the last to understand any of her teammates, being the only one not to be reared in a world of sacrifice and promises. She was the only one that had never been forced to give up something dear in the name of shadowy fate.
As such she didn't realize the kind of chains a shinobi like Kakashi carried, the utter trauma of being the "last" Uchiha, or just how much Naruto needed for her to look at him as more than the third in her private fantasy.
5.
The Sharingan demanded blood.
Two out of last three wielders of the Sharingan had willingly and unwillingly unlocked its ultimate form, Mangekyo Sharingan. Sasuke just had to pick which of his teammates would serve as the alter for his power.
Something else no one warned Team Seven about.