(truthseeker)...The point of contention is the dubious morality of the SB (Supreme Being) as you described.
The fact that the account relates the alleged opinion of the SB does not make this opinion either correct or moral.
Elsewhere others have considered this indiscriminate brutalization of life as described in the account about the flood to be an insane abuse of power, and not particularly effective in reasoning with the creation as regards moral behavior.
It is as if Jehovah were a drunken abusive father who gave everyone in the family a massive drunken beating.
So I'm supposed to love a creature who would behave in this manner?
I can't even begin to think of an excuse for genocide.
"I brought you into this world, and I can take you out of it!", thus saith the LORD.