What did Damon do that makes him deserve redemption?
Stefan too for that matter.
All they've both really done is meet and fall in love with super hot teenage girls. That's not something anyone would find hard to do, it's more of a reward than anything.
They've still killed people when they were mad or sometimes just depressed, and the only people they protect are friends and family most of the time so really, what makes them so forgivable and worthy of redemption?
If you go into Mystic Falls and you don't know Damon or Stefan personally you're going to die, maybe even at their hands depending on their current mood. Heck, even if you do know them your odds of surviving only go up a little.
Yeah, I know this is a supernatural drama about vampires and I still like it but I just find this funny.