Thing is, God didn't actually "say all "those things were His will. It was a human, who made that up to explain why all this stuff happens. They were saying things like that long before Christianity was invented.
God is not evil in nature. But we all have to live in His world and survive, or not. And our bodies are subject to all ills. If they were not, we would be immortal. Your body is not the important part of you. You leave it behind at some point, and go with God, Who takes you home.
God has not ever promised us that we will not suffer, and he never promised us life for a length of time that WE choose.
Instead, He promised us that He would be with us, right by our side, as we cross to the other side. I remember being so frightened, right before surgery, and I decided to pray. I think I really connected, because the deepest peace I have ever felt washed over me...and now I know that God's peace is His greatest gift.