I think is our ignorance that pushed the blame theory. We humans are weak. That's why we like to blame everyone else for our problems. And more often, we blame God.

My thought is, maybe because God knows everything before it happens so we think he should have avoided these challenges.

In our ignorance, we fail to see that the God we blame also allowed these things to happen because he's either reprimanding us for something we did wrong or because he's preparing us for something bigger.