How can anybody hate life as much as I do?

I am 28 and have been miserable for years. People have been hateful to me for years. I still live with my parents. My papaw just died 18 days ago. I was a paul bearer at his funeral. My mamaw died in 1991. I am on anxiety medicine and depression medicines. I have had 2 girlfriends in the past 4 years who have both left me for somebody else. So how is it possible that anybody in the world can be more miserable than me? There is just no way anybody else could be.