I don't believe sharks, tigers, or grizzly bears are a manifestation of evil, even if humans are occasionally attacked by them.
A lot of diseases end up being the result of human behavior, diabetes, obesity, cancers resulting from long term exposure to synthetic toxic carcinogens.
I don't think humans are supposed to be immortal; that would makes us divine beings ourselves. We have to die somehow and in someway.
An all loving and beneficent creator is a Christian construction which is not neccesarily applicable to other religions.
We have evolved the cognitive capacity and reason to imagine how to avoid conflict with grizzly bears, how to minimize the risk of death by flood or earthquake, how to prepare for fire risks, how to treat and maintain our bodies to be at low risk of obesity, cancer, heart disease.
That doesn't prove anything about the existence of gods. But I think it sufficiently dismantles the argument that there cannot be any higher transcendent power because fire, earthquake, flood, and death.