To make a long and painful story as short as I can manage, 27 torturous deaths and resurrections not only f***ed Ben up in the brain, they warped and corroded his very soul, as explained by Death herself when she first appeared to Ben in issues 6-7 of PAD's Scarlet Spider. It was Ben's willingness to sacrifice himself for Kaine and a little girl who had just died senselessly at the hands of some random jerks with guns that persuaded Death to give him a second chance, fixing his physical degeneration scars and restoring Kaine (and the little girl) to life. However, Ben's degeneration scars started returning when he began backsliding by beating a man almost to death; as reprehensible as that man was for deliberately stealing food and other aid that would have gone to the struggling people of Las Vegas after it got blasted in Secret Empire for the sake of spiting his sister, he was still a powerless human up against someone with all of Spider-Man's powers and almost none of Spider-Man's moral compass left, so that dinged Ben's karma pretty badly.