I should have been clear what I meant by cynicism. I meant a skepticism regarding human goodness and innate human dignity, and a skepticism regarding good and evil. Certainly art must not always be happy, but there is a difference between art that is realistic, and sad, and art that is cynical.
Take, for example, the films of Robert Bresson. He was influenced by Jansenism, a terrible heresy, but nonetheless his films, while at times very bleak, show the possibility of grace in the midst of sorrow and tragedy. I don’t find his films cynical, though, even as he portrays cruelty and immorality. Or, look at the Inferno of Dante. It’s hard to find a subject more sad than the eternal loss of God (I would say it’s the saddest subject of all), yet Dante manages to point to something greater in the midst of such sorrow.
I just think there is a difference between the cruelty and darkness in media these days and what I would call the Christian response to tragedy and darkness, which should (I think) be one of realism with an ever-present reverence for God. The way television shows portray such things is with a very materialistic, atheistic mindset where good can become evil very easily and evil can be excused, and life is all that matters. It’s very relativistic. It reminds me of Bertolt Brecht’s (a communist playwright and poet) saying “First grub, then ethics.” That is, first material comfort and satisfaction, then we can worry about morality. That’s not reconcilable with Catholic teaching.