God Has A Lot on His Plate
I understand how you feel. There are plenty of things that have happened to me that I know God could have stopped, but he didn’t. There are things going on right now that need to be solved all over the world, and God could do it… if life was easy and perfect.
The point is, if God solved all of our problems it would make life to easy. He would end world hunger, and then another problem would come up, and we would expect him to solve it too. Take the Israelites escape from Egypt. God freed them (through Moses), and then when they got to the desert, they complained, and needed more help.
Since then, God has decided to take a less direct approach to solving our problems. With his help, thousands of people around the World are being saved (in the since of being able to go to Heaven and saved from bad situations).
Also, God does not kill directly. Yes, the enviroment (Hurricanes, etc.) has cost a toll on human life, but it has also brought nations and countries together to help.