put yourself in his shoes, his sister was kidnapped and then murdered, but you go through life not knowing about it until the police tell you some years later that she is infact dead. During that time people make prank calls to your house telling you they have found her, that shes dead and wont be found. It is IMPOSSIBLE for a guy like Vitor - the only bread winner in his family - to focus on fights. He openly admitted he couldnt train and was only 50% for his fights.
The only guy who really beat him was Randy, but Randy beat everybody. He lost a decision against Sak, then one to Chuck but was still 14-3 in MMA. Hell even Chuck didnt have a perfect record