Science

The Biblical God is beyond viciously cruel, what with drowning almost the entire population of the Earth, just for starters. The god that most mainstream U.S. Christians believe in either caused or allowed real-world atrocities that are too numerous to mention, but I'll throw out just one from the last 100 years -- the Holocaust. I guess "He" [of course the omnipotent being is envisioned as male in these patriarchal religions] gets around to deciding football game outcomes, though.

Some use "God gave humans free will" as an excuse for its behavior, but that means it's an evil, cruel god who won't step in.

But at the same time, "He has a plan!"

Go figure.

Like you said, a morally corrupt bully, and that's being generous.