I don't believe a kid should be penalized the rest of his life for something he did at 14 years old. But he should probably show a little more remorse and actually apologize
But there's only been 4 years since his court date at 14, and the abuse went on for 6. Plus Miller continued to harass the family for 2 years post court date, despite a court order to stay away. And again, this isn't as simple as "oh he said some words, we all made mistakes at 14". He made the victim eat piss-covered candy from a urinal and then bashed his head into a wall, after years of continued abuse and torture. The only reason that video hasn't been released was because they plead guilty to avoid a worse punishment.
This also isn't penalizing him for life. This is just saying "you haven't earned the right to play in the NHL".