Just Seem to be Angry?

"angry with God?" Ecclesiastes 6:10,12..."no man can contend with one who is stronger than he... who knows what is good for a man in life" Lots of people today are fighting with God. They're angry with God. They're bitter against God. It's because their lives have not worked out to their desire. You see, I think God should only allow good things to happen to me...but really, what do I know? The Bible says I don't know my own heart. It's deceitful and desperately wicked. God knows. God knows what is best for me. " Oh, Why Lord, why do I struggle so much with that? Help me Lord!"