Is Life Really Such a Perfect Circle?

At my store I get some of the worst people I have ever met, they are rude, always looking for free food, stealing, being rowdy, drunk, high, and otherwise just being jerks. I wonder how selfish and ridiculous our society can get when most of our "problems" aren't really problems but insignificant, minuscule inconveniences. "I apologize that we are out of this or that, I am but one man and we were busy." I always have a professional attitude when dealing with such people who throw a fit because they can't get something that they want, right now, the way they want it, and if they can't, that becomes unacceptable that it makes them physically mad and upset. I can't even begin to wrap my mind around the idea that something so insignificant could even begin to upset someone, as one of my customers once said, "listen, it's alright, if a slightly messed up sandwich is my biggest problem of the day...well...maybe I got some bigger issues I need to address." I've seen people get angry, throw a tantrum, and walk out because of something so small. It was the biggest regression of maturity I have ever witnessed, how can you claim yourself a man or woman if you act like a 5yr old child? As the nights drag on, days seem to blur, it all seems to be one never ending night, some sick kind of eternal darkness. Under the buzz of the fluorescent lights I stand, wasting away behind some counter, just to make a little money to pay tuition for a better opportunity at life. For what though...to stand behind a better counter? maybe get a chair or an office, make a little more money, but am I wasting away any less? will all that "accomplishment" make me happy? Can I really be happy here, stuck, life passing me by, one night at a time?