PhantomEcho said:
It makes me curious to know what you would have it replaced with, had you a choice.
What sort of things would you prefer? Is it the glorification of death and devastation that tires you, or its mere presence? If you had the funding to create a show or game or movie of your own... what would you choose to make based upon your tiredness with violence?
These questions, to me, are much more interesting than arguing over specific uses of nuclear war.
Violence has a purpose. Violence for violence's sake does not. A little levity can go a long way. Going back to Warhammer 40000, while I love the setting, I get tired of seeing the same story repeated over and over, with no happy ending in sight. Oh look, an Imperial Guard regiment not crewed by assholes! They get eaten by Tyranids. Having an ideal to strive towards, a positive goal, or the simple hope that things will get better can help drive a plot forward and make it compelling.
Film director Don Bluth once said that children can endure absolute nightmares and terror so long as a happy ending can be given. His movies often reflect that (An American Tale has child separation, The Land before time has the apocalypse, and Titan A.E starts with a near genocide). So if you are going to run your characters through shit, put something on the end of it to make it all better.
Again, that isn't to say that a nihilistic, cynical ending where everyone dies shouldn't be allowed. It's the overabundance of nihilistic cynical endings that's the problem.
The reverse can be said about my point on Nuclear war. If you are going to include something that monumental, follow through on it. Don't just put it in for the sake of scale, but work out just what that would mean for the characters involved.