1. Kakashi's Traumatic Move: When Naruto was a genin, Kakashi tested his team's comradeship by playing the bell-stealing exercise. Kakashi used his signature move, Thousand Years of Death, to surprise Naruto from behind. This may have left a psychological trauma on Naruto.
2. Sakura's Powerful Punches: Sakura, Naruto's childhood friend, frequently used violence against him in ninja school. After becoming Tsunade's apprentice, Sakura gained Tsunade's super strength.
3. Hinata's Devastating Attack: Hinata, Naruto's daughter, can freely activate or deactivate her Byakugan. Once, when Boruto angered Hinata, she used a pressure point attack on Naruto, instantly knocking him down and even affecting the Nine-Tails inside him. This power may have surpassed the Six Paths.
4. Pain's Destructive Almighty Push: During Naruto's battle with Pain, he suffered greatly from Pain's Almighty Push.
5. Overcoming Genjutsu: Naruto used to be afraid of genjutsu as he didn't know how to break free from it. However, now that Naruto and the Nine-Tails have become good partners, genjutsu doesn't pose much of a threat anymore.