It's because you live in America. Westerners are out-of-touch with values and they're neurotic. That's where all Popular Comedy originates in America from: Neurosis - being insecure with your body, your feelings, relationships, your surroundings, marriage, death, etc. Native American Indians were in-touch with everything around them and valued everyone and everything. Listen to some of the many Eastern Philosophy lectures from Alan Watts. He explains why Westerners are alienated from day one and he is very precise.

From The Book: On the Taboo Against Knowing Who You Are (Alan Watts) -

"We are superb materialists. [Aircraft interior design] for the comfort of passengers is nothing but frippery. High-heeled, narrow-hipped, doll-type girls serving imitation, warmed-over meals. For our pleasures are not material pleasures but symbols of pleasure - attractively packaged but inferior in content."

The Book: On the Taboo Against Knowing Who You Are: Alan Watts: 9780679723004: Amazon.com: Books

It could also be you're suffering from a mood disorder: unipolar or bipolar depression. My irritability/agitation fluctuates to extremes and is triggered very easily. Only meds that have worked for me for brief periods have been zyprexa, adderall, ritalin, tegretol with lots of side effects.