Hmmm.
The problem is that the Flood Myth is like VonHelmet said, an allegorical story of the salvation of one man's soul in the midst of damnation. It is an allegorical story of Hope, rather than one of destruction.
Of course you can take it as literal and question the actions of God in the way that you have, although that would be down to personal interpretation rather than any theological consensus of the veracity of the literal flood.
The Flood Myth is almost certainly something held over from the original belief structures of early mankind than followed him out of the cradle of Africa, and the myth is present in one form or another in almost all cultures at some point in their development.
http://www.talkorigins.org/faqs/flood-myths.html
even if allegorical the message is still a clear do as i say or i will hurt you and those you love.
How about the plagues in Egypt, what does murdering the children of people who do not live in a democracy (and as such have little to no power to change the will of their king) have to do with hope or goodness?
To me the message "i will murder your children if you don't do as i say" is not really a message of hope or good.
A true message of hope would simply have been to whisk the Israelites away and plonk them down in their new homeland, he's directly interfering anyway so a method of intervention which does not result in the wholesale slaughter of innocent children is surely the better option?
It depends on how much authority you are prepared to grant God, which is a curious and almost laughable notion, but there we go. If we accept that God created everything and it is his to do with as he will, then there's really not much to complain about when he does as he sees fit. It's not as trivial and act as all that, though.
The act of creation does not give one absolute authority over you creations.
We are told repeatedly we are gods children, if a father punished his daughters for her misdeeds by slitting her child's throat as it's slept you could never forgive that act or perceive it as his right as the creator of the line.
God had created people. He had told them to be good. They were not good. Verse 5 says that all their thoughts were evil. That's quite a far cry from what God had intended.
Then god is a fallible fool who produced a broken invention and chose to try and correct it with either ever more abhorrent acts or simply threats of the actions he can and will bestow upon man if they still miss behave.
out of curiosity though, how come all the bad stuff is "allegorical" yet the good stuff is literal?
Verse 6 says that God was deeply troubled by this, and that he regretted having put people on earth in the first place. This is not some tyrant punishing his subjects. It's a creator being so woefully disappointed in his creation that he feels like giving it up as a bad job.
If he's a god he can fix them, leave them to their own devices or he can painlessly euthanise them.
It seems he chose to torment his creations for a while then abandon them.
As such if he is our creator he should be thanked for the initial effort of creation and we should be thankful that his idea failed, as if it had succeed as planned we (you and I) would not exist as we are the product of the broken sinful system that resulted, and move on. To take up where he left off and improve ourselves and our lot in life.
Make of it what you will, but it's not quite the way you're painting it, and certainly not if you are prepared to grant God any authority whatsoever over what he's created.
I am a human I can only judge men and Gods by the same human standards.
If a god cannot measure up to the standards we judge ourselves by then he shall never measure up to the standard of a God.