Again, are you suggesting he should have broken the terms of his probation or, after that was done, dropped by to chat with a person he tormented so he could cleanse his conscience and be as pure as most of us internet denizens are?
I will say up front, the possibility Miller is a complete asshole certainly exists. But once he entered the criminal process for his actions, a lot of high minded avenues of making things right were denied to him. And given his age at the time, it's nearly impossible to imagine him not falling into trap of thinking it was him being screwed here, really, leading to wrongheaded resentment that takes work, time and maturity to see as delusion.
Given what he did, what the victim went through, what was likely percolating in Miller's head, the best thing for all involved was for Miller to be punished and never see nor contact that family again. The mother won't like it. The victim won't be magically purged of his memories of that abuse. And Miller won't get to join us perfect, guiltless internet saints and hate on all the evil, disgusting people that aren't like us at all.
But the abuse is done, the abuser punished and victim has closure. If Miller isn't a shit, he should donate some of his salary to anti-bullying causes, then we can all hold hands and find someone else to hector.