“Do you realize that all great literature is all about what a bummer it is to be a human being? Isn’t it such a relief to have somebody say that?” — Kurt Vonnegut, "A Man Without A Country"
Fascinating statement which, if true, seems something of an indictment of great literature given how unlike the gospel message that seems to be.
We are supposed to "rejoice always" as St. Paul says, and see life as "a romance" as Chesterton wrote. Gratitude and "count your blessings" seems to be the mark of a mature Christian (unfortunately often not my mark!), while with artists it seems to be "say how it sucks to be human".