I couldn't tell you one good thing about my life right now. Seriously everything that could go wrong has.
I've said it before, I'll say it again: Narcissists maintain their own doomsday self-fulfilling prophecies. Everything in their lives "goes wrong" because they make it so. They constantly reap what they sow, and since what they sow ain't nice, what they reap ain't nice either. Narcissists get what they expect, and they get exactly what they deserve.
There is no such thing as a "prosperous" narcissist. Narcissists don't prosper, they merely float through life, using and abusing, and remaining hopelessly empty. It's impossible to be truly happy under those circumstances.
I no longer feel badly for NSIL, but I do hold out a sliver of hope that going away to college might shed some light on the miserable path she has chosen to follow. I doubt it, but stranger things have been known to happen. Her tweet makes me wonder what, precisely she thinks has gone wrong. Is there, at least on some level, an awareness that the superficial glaze she keeps licking off of her NM's cake of Narcissism is, in fact, poison? Does she have ANY idea that life beyond her dysfunctional roots could be different, even better? Did she catch a whiff of the freedom that's just beyond her grasp?
And IF she has an idea, even a little one, will it be enough?
If she doesn't learn, if she doesn't awaken, then she is doomed to finish out the rest of her days milling about miserably, never knowing true happiness, most likely spouting her despair to those who will listen, on whatever current soap-box she happens to find. She'll continue tweeting about her distress, never realizing that no amount of re-tweets or sympathetic pats-on-the-back will solve her problems.
Good luck, NSIL. I'm beginning to believe the only thing that will save you is just that: an insane amount of luck.