No, I don't think any life has been wasted. Even among the worst examples I could think of, that person has been loved by someone. In some way, at some time, they brought joy to another, gave one reason to ponder, to rethink, to take a stand, to speak out.........etc
Wasting our talent, and failing to become our best, can be done. Sucess is relative, and I can't define it for anyone else.