You mean like the god of the old testament?
"And the LORD sent fiery serpents among the people, and they bit the people; and much people of Israel died." (Numbers 21:5)
"And he smote the men of Bethshemesh, because they had looked into the ark of the LORD, even he smote of the people fifty thousand and threescore and ten men: and the people lamented, because the LORD had smitten many of the people with a great slaughter" (I Samuel 6:19)
"Thus saith the LORD of hosts, I remember that which Amalek did to Israel, how he laid wait for him in the way, when he came up from Egypt. Now go and smite Amalek, and utterly destroy all that they have, and spare them not; but slay both man and woman, infant and suckling, ox and sheep, camel and ass." (I Samuel 15:2-3)
"This said the LORD, Behold, I will raise up evil against thee out of thine own house, and I will take thy wives before thine eyes, and give them unto thy neighbour, and he shall lie with thy wives in the sight of this sun."(II Samuel 12:11)
These are only a few examples of divine cruelty (I only chose a few passages where it is clear that the words/deeds are directly attributed god/the lord ... there are much more however)
Well, sorry, but I wouldn´t want to get ruled by a god who orders atrocities and even mistreats his own people.
So, with god as a ruler we would have a god who:
-Orders whole populations of cities to get killed, with even the kids not getting spared, just because they belong to another nation/race.
-Doesn´t hesitate to send thousands of his own people to death, just because some of them disobeyed an order.
-Doesn´t see women as persons, but just as property of their men, who can be used to punish said men
I think to imagine such a ruler we should just take the worst sides from Hitler, Stalin and Pol Pot and mix them together ;)