First off, Sasuke's main flaw, according to Obito and to a while history of Uchiha's deeds, is that he is more accustomed to think that revenge and blood will solve things better than anything else. After he lost his subject of hatred (Itachi) he was all confused and didn't care about just anything. He needed to find another thing to hate, another goal in avenging something.
That said, the (barely) ojective point Sasuke makes is that Konoha's peace and tranquility is built upon a lie. The Uchiha had to be erased for the Senju-centric Konoha to mantain its status quo (that is, of course, the interpretation of the events by Obito, someone who is more than happy to lift every responsability from the Uchiha and from himself). The annihilation of an entire clan is carried out under a face-saving lie that happens to put all the blame on one kid's shoulders, and that kid happens to be Itachi, the brother who loved him beyond limits. You can guess on your own how much value Sasuke puts on such peace: zero.