I listen to creepypasta readings all the time, they pretty much always end with all hope extinguished 
Personally, short horror stories aside, I absolutely cannot stand stories that are told in a pessimistic attitude. Due to personal experiences with people of the type that I won't even get into because that would end up being a story in and of itself that nobody asked for. I just find myself endlessly sighing at it when it occurs, no matter the point that it's trying to convey. Hell, I get even angrier if it's trying to convey a point I agree with.
The endings themselves aren't as important in my mind as the journey there, though. I can accept a sad ending as long as the whole story isn't told in a lens of "everything sucks because that's REALISM I TELL YOU THE WORLD HATES YOU OPEN YOUR EYES!!!!"