First and foremost, there's the fact that his father and grandfather are two of the most evil and ruthless individuals who've ever lived on the face of the earth. Secondly, his mother was cruelly and abruptly taken from him while he was still a teenager. Thirdly, he was betrayed by his grandfather, whom he trusted deeply. Fourthly, the return of his great-grandfather, Jinpachi Mishima, has caused him to begin losing his internal struggle with the Devil within. Fifth, the appearance of Azazel prompts him to corrupt the Mishima Zaibatsu further just for the chance to face the beast and sacrifice himself to destroy it. Each of these occurs to a helpless and unassuming Jin, who is simply doing what he can to set things right at every turn.