The worst person in the world is better than the Biblical god, if the deeds attributed to it have any truth.
Indeed "IF"
In the Middle Ages (1500) people were quite barbaric, so in the years of Muhammad (0700) even more barbaric is my guess.
Imagine how barbaric they were in the time of Jesus (0000).
I don't know when Thor and the others lived, but I can imagine people still believed in those Gods too; thinking of the whale story.
So when the Bible talks about people dying, I can imagine they attributed it to God, whereas in reality it was just a natural disaster
So the stories of some barbaric people say nothing to me about this hypothetical God to whom they attribute all their troubles
Even now many people have this tendency to blame others for their own faults. In those years they blamed it on God.