Why so many complaints?

I'm quite a calm person, but there's one thing that really gets on my nerves, and that's people complaining and moaning about any and everything.
"I'm tired of this weather." "The traffic is chaotic." "The bus is late." "That is too expensive." "It's too loud." "It's too full." Please! Why don't people just take a deep breath, put on a smile, and look the other way? The bus won't come any faster if you get annoyed; the car in front on you won't speed up if you yell at the driver, the rain won't stop just because you are tired of it.
Thing are what they are, get used to it! If you don't like something, try to change it, do something useful, but please stop moaning, yealling, sighing, and snapping. That won't change a thing, and the only one wasting energy is your own self.

Carmo A. Sousa