A "good" ending can only happen if there is an option to not get hit with Soulkiller once you jack into Mikoshi. And the only option not to do that, is to either commit suicide, or to let Arasaka mess you up, with a crummy chip in your head and 6 months to live as a disabled person (or to get hit with Soulkiller).
The original V dies, in every other ending. And in some endings V's copy either goes to cyberspace, to be gobbled up by Alt, or goes back to their body, to die in 6 months.
The V that we start the game as, has no chance at survival. And that's lazy and bad writing and not worthy of an RPG that promised meaningful "choices".