I said in my comment that the justice system probably missed in this case, but I'm not really interested in adjudicating whether it was right or wrong in its result. I'm starting with the premise of the system maybe having done its job, because a lot of people use the fact of the case to beat around the bush and not say what they really mean - that former criminals such as rapists shouldn't see the light of day in society.
See to me, if one never ever commits a crime again after having previously commited a crime, regardless of the method used, it should be seen as a success. Focusing on the "did the time" is just advocating for punitive justice. You're saying it's not possible that he's changed because he wasn't punished enough, and should just be punished more regardless of the conclusion the system arrived at. But I wonder if more punishment would really change a person for the better.
The punitive justice system doesn't care whether criminals do the crime again. It doesn't matter if a rapist is unrepentant, they serve their 7-14 years or whatever and then they're free again. In this, I don't think it's a more positive outcome than someone serving less time in prison. The punishment amount ultimately doesn't necessarily serve a purpose other than inflicting harm on the guilty. You don't believe he's changed, but neither of us really knows, and we couldn't really prove that he would change if he spent another 20 years in a cage.
But one thing we do know, based on a lot of research into human psychology and sociology is that if you treat a person like a monster, they tend to become monsters. The more you ostracize someone the fewer options they have, the more they're pushed back towards being unable to live a normal, lawful life. The US has one of the most punitive justice systems and they have a recidivism rate of like 80% within 5 years of release. Over in incarceration systems like the Netherlands', it's about half of that.
There's really no evidence to support the claim that more prison time = more well behaved citizens after, in fact all evidence pretty much points to the contrary. So I gotta wonder why people would advocate for it. And surely, in this case and other extreme cases, it is because of the crime. Whether he changed or not, whether he ever commits a crime again or not, whether he does feel remorse or not, let's not kid ourselves that it would matter for most people.
Most of the people here wouldn't feel differently if he had come out with an apology or something. It's just a smokescreen for bloodsports, for wanting a bad man punished, not turned into a not-so-bad man. There is something innate in us screaming to have the ill elements of our society tortured, and it's just an inherently reactionary impulse that we as a society need to work out of our system to actually create a better world instead of just perpetuating a neverending cycle of suffering.
And by all means, hate the guy, for sure. The boos are deserved and all, I'm not saying he shouldn't catch any flack, but I don't think kicking him off a sports team or sending him to jail for another couple of years will untraumatize that poor kid he raped, nor will it make him a better person.