Happiness is a CHOICE. You prescribe your own happiness. It's really ALL about the mindset. You are the only one in the way of your own happiness. Yes, there is a lot of negativity in the world but to be happy you have to learn to see past that and focus on everything positive in your life, and love yourself over anyone else.
Somehow people always want to blame God for the bad things that happen in life, you know that old arguement "If God is so great and loving why did my house get broke into and we became poor?" to which i reply "Its not Gods fault your dad is a drug dealer and he sold someone a bad batch who them followed him home and ransacked his house."