Well people like to blame Sasuke for a lot of things... People say:
1. He is overpowered even though we haven't seen any of his abilities and Naruto is off mastering Kyuubi mode
2. Sasuke is crazy even though anyone would be if your brother sacrificed his life into endless misery for the sake of his little brother and the village
3. Sasuke is easily manipulated by Madara, which is true, but Sasuke allows people to manipulate him (like Orochimaru) just to gain power for his objectives
4. Sasuke is plotting to destroy the hidden leaf and yes, this is true but with everyone in the hidden leaf, they won't go down so easy
People like to see the bad side of Sasuke and completely ignore the reasons for why he does them. Sasuke wants revenge, and that's an everlasting hatred that runs through the Uchiha blood. Now Sasuke has taken on the hatred of his entire clan, and he simply can't handle that by himself. Naruto can't take on the peace of the world by himself either, which is why he has so many people around him. Sasuke is losing control and is gaining power through his hatred, but he is by no means overpowered because right now, Naruto is more powerful than Sasuke. Sasuke can be seen as evil, sure, but the truth is, when there is a reason behind evil, it actually isn't evil. Sasuke has a reason for his revenge, which means that he just needs Naruto to bring him back to the light.