Genesis 6:6 is specifically about God’s sorrow over man’s sin. God obviously did not regret His decision to create man. The fact that we are alive today is proof that God did not “change His mind” about the creation. https://twitter.com/pinkheretic/status/1249548299910221824

God tells us of the cautionary nature of some of His declarations and the fact that He will act in accordance with *our* choices.

The bottom line is that God is entirely consistent.