I wouldn't say evil, I would actually say that the MC grew into a man who most would say is overly good, someone who always tries to see the best in others, and will always offer redemption to others no matter how much 'wrong' they have done.
But obviously had to balance that and naivety, so I tried to show a reformed man who in his childhood wasn't evil but was misguided, immature, and mean, pretty much a stereotypical high school bully who takes jokes way too far, but because of his choices and circumstances out of his control he was implicated in a serious crime. Came to terms with it, while in prison and is actively trying to redeem himself for his mistakes. At worst I wanted him to come of as 'petty evil'. But I probably leaned overly much into his mistakes.
I may go over and change some small details to try balance it out.