You did what needed to be done to protect the rest of society, that is what the prison system is for. It is a time out, so to speak, for adults. It is a punishment for the bad and protection against that person for the public. Dont feel bad for what you did, it needed to be done. I would feel bad that the man was permantly injured and will have to live with this for the rest of his life, this kid only has to do his time in prison.
As for the kid being worse when he gets out? You did send him to club med.
To many people lost touch with what the prison system is. Its not a offender reformer, but punishment to the offender (they all know the consquences if caught), and protects us from them. They do have programs to help some (thats up to them) but the serious offenders are already set in there minds, personalities, lifestyles, ECT. They will not be reformed because they dont want to.