On the night of the uchiha masacare, Itachi could have simply killed sasuke and ended his life. But instead he gave sasuke a chance to become a hero by having sasuke kill him and be labeled as the hero of the uchihas. Yet what sasuke does is f*ck all of itachis efforts up and and does what Tobi wants him to do. Instead of carrying on his brothers wish for what he has done for him, he tries to do exactly the opposite. Is that really how your supposed to thank your brother? Sasugay?