Fast food problem

So recently I found myself complaining while I waited for my child to get her food at McDonald's.  How did I get here?  How did a few minutes extra for food become a reason for anger.  I had to step back and remind myself the world is full of people not getting food.  How long do they wait for food?  We have food, so now we bitch about how quickly we get it. 
We have become a world of obscene appetites.  In America our servings are too big!  WE EAT TOO MUCH!
How simple can it get?  Eat less.