Wait...WHAT? What game are YOU playing?
First off; at the beginning, Dante didn't cut himself, those were from the women he had sex with the night before. Sometimes when you're having sex, women will scratch your back from how hard you're doing it. Second, he opened his chest to test whether or not he would be dead since he should've died after getting stabbed in the heart in a street fight. Opening a wound hurts like hell. Trust me. Third, He didn't fight the government, he fought demons who haunted him and never gave him a break. He didn't start fighting an actual tyrannical government until Vergil asked him to.
Dante was never raped by demons. He was held in different prisons and an orphanage that abused and tortured him on a daily basis. If you want to use rape, Kat was abused by her demon step-father and even then she didn't say rape, but "attacked" and that could mean many things.