"He would have turned 18 this month."
Instead, he killed someone in a crash and, later, died of his injuries.
Don't you think he paid for his action, whatever it was?
This wasn't his 2nd or 3rd DUI. He wasn't an experienced driver. He didn't walk away to be on his merry way. He did not live to see 18.
Tragic for everyone. Hard to fathom. 
I take it that you have never run a red light, had a close call behind the wheel. I know I have. I've also avoided crashes because of other driver's carelessness or whatever. 
It boggles my mind that you can be so resentful of a dead boy - of the friends who wish to honor him.