Notably, when Sakura tells Sasuke she "wants to understand him better", he rants at her and threatens to murder her parents. In this story, Sasuke's a psychopath ready to murder his teammates at the drop of a hat from the very beginning.
Adaptational Jerkass: In canon, Sasuke started out gruff and unfriendly but eventually warmed up to his team.
Such as knowing Rasengan before the Wave mission, maintaining control over three tails worth of Kurama's chakra, and gaining Perfect Kyuubi Mode and learning Hiraishin when Itachi and Kisame first arrive.
Adaptational Badass: Due to "Naru-nii's" help, Naruto becomes far stronger far faster than canon.
Achievements in Ignorance: Naruto gives Kurenai what he believes to be a pretty but unremarkable flower, only for Ino to reveal it's easily worth six figures at a minimum due to its beauty and rarity.
The Ace: Multiple factions want Naruto to join them but have all realized that he's too physically powerful, and potentially politically important, to force so they have to find a way to coerce him into willingly defecting from Konoha.
What started with either praising or criticizing children (depending on their group) all the time quickly evolved to things like ordering them to drug and kidnap child prostitutes, murder their pets, or deliver increasingly painful shocks to prisoners.
Samui's and Atsui's parents oversaw the Monster Study.