What you are describing is called The Prosperity Gospel.
It's a false gospel that basically says God wants you to have Prosperity in this life! He wants you to be healed, it's your fault if you aren't because you don't have enough faith or money.
The truth of real christianity is that you might not get healed of cancer, a huge storm can wipe out a whole people group, your whole life can fall apart. But we feel like in this life, we have the holy spirit to comfort us through our trials (if you are a believer in Christ!). And the suffering in this life is not comparable to the joy in the life to come.
Life can be wonderful, it can be a waking nightmare!! That doesn't mean there is no God just because someone dies. We're all going to die.
But I just wanted to clear up the Prosperity heresy that's out there!