1. Betrayal: Sasuke defected from Konoha to seek revenge against Itachi and gain power by joining Orochimaru.

2. Tailed Beasts: Manipulated by Madara, Sasuke joined the Akatsuki to capture the Eight-Tails, causing tension between Konoha and Kumogakure. 

3. Chaos at the Summit: Sasuke unexpectedly appeared at the Five Kage Summit and attempted to assassinate them, but was saved by Gaara and Madara. 

4. Assassinating Danzo: Sasuke targeted Danzo, succeeding in killing him and considering killing Sakura and Kakashi, further pushing him into darkness. 

5. Ninja World Revolution: In the Fourth Great Ninja War, Sasuke aimed to become Hokage and initiate a revolution by fighting the current Kage and imprisoning all Tailed Beasts, ultimately being defeated by Naruto. Some fans doubt his redemption.