You're not supposed to deal with the world. No individual is supposed to put that responsibility on oneself. You have to remember that the ugly and crazy that you witness now is the same ugly and crazy that our parents lived through and their parents before them. The ugly has always been there. The only difference is that our generation has been awarded front row seats to the freak show through the amazing gift/curse that is the internet. And trust me when I say this. Nobody should have to see and deal with half of the fucked up shit that we get to see through the internet on a daily basis. Ignorance is truly bliss.
I'm going to prescribe some advise for you. Stay clear of the Internet, TV and Media for one or two weeks. Just unplug everything that connects you to the world and relax for a few weeks. The world isn't your problem, it's okay to be selfish and take care of yourself every once in a while.