One of the things I learn from life is, the quality of your life really can't be measured by the quantity of what you have. If that was true, rich people with a lot of money would be the happiest. But look around you. I still meet a lot of "poor" people because they have nothing but money. Surprisingly, I also meet people who don't really have much, but they look happy and really enjoy their days. They are the people who know to be grateful for the simple things in life. They are the smart people who know that happiness doesn't cost much. They know that happiness is about what we feel and not what we have.
So, every time you feel like complaining for not having more, remember that you can be happy when you are grateful, and your life can be easy when you have the right attitude. It really has nothing to do with how much you have.