For me "Things don't always work out" has been ingrained into my mind since I was young. Aka, I never was delusional nor did I ever believe all life's tribulations played out like a fluffy Disney movie complete with happy endings. lol. It just seems as if they're trying to throw something in our faces most of us know already. (Though I wouldn't show Blue Valentine to kids. It would ruin them!)
I felt the same about Super. When Ellen Page's character got her head blown off I felt as if the director was screaming "See?! This is the grim reality of being a vigilante or a super hero!". To which my mental reply was "No shit,Sherlock! Most comic book fans know this already! Showing me Ellen's fake skull fragments and brain matter isn't giving me an epiphany. Thus if that was your goal you failed miserably."
I find it kind of hillarious when these pretentious movie makers try to shock us. As if anything could be more grim or upsetting than real life.