Yet the Book of Genesis 6:6 tells us that God "grieved" (NIV) or "was sorry" (NAB) or "repented" (KJV) for having made man.
That doesn't square with your statement. But I fully agree with it! It's the Book of Genesis that is error when it portrays God as regretting His own action.
Nothing in my statement that disagrees with Gen. 6:6.
If I built a car from scratch, used it, took care of it, and eventually found it was time to put it on the scrap heap, I may have regretted having to do so, I may even regretted having built it in the first place, but it wasn’t wrong to build it, nor was it wrong to destroy it. It was mine to do as I wished.