Why do people think God is perfect and doesn't make mistakes?

[eleos1954]

In Genesis 1:31, god was delighted with his creation. In Genesis6:6, god regretted his creation so much that it grieved his heart.
Do these verses not call into question god's supposed omniscience?
Why would a being that was supposedly omniscient, and being omniscient have known that things would turn pear-shaped and that he would end up destroying his earthly creation?
And why would a supposedly omnipotent, omniscient being feel regret and grief so much that it broke his heart?
It just doesn't make sense.
As for poor old Adam and Eve getting a bad press. Surely they were two innocents who had no idea about right and wrong and did this omniscient being not realize that crafty old lucifer would be in the mix stirring things up?
As I said, it doesn't make sense!

“God is able to feel sorrow for an act in view of foreknown evil and yet go ahead and do it for wise reasons.”

God created His intelligent beings with free choice. TRUE love can not exist without it. One can not force one to love God or one another .... God knows that ... we know that.

It saddens Him that some will not choose Love.

God was up front with Adam & Eve ... they were told if they ate from the tree of knowledge of good and evil that they would die .... one either believes what God says .... or not. They put their trust in what satan said, rather that what God said.