Is this another of those "God can't..." moments?
But I reckon we need our villains to make us feel better about outselves.
I have my own rogues gallery: Hitler, Stalin, Tse-Tung Mao, all the members of the Kim Dynasty: Il-sung, Jong-ll, Jong-Un, & Yo-jong, Pol Pot, Cump Sherman, George Custer, and a scad of others of that ilk. I'd like them all to spend a couple of millennia being roasted over a slow fire and/or eaten by scorpions. But me, being a regular old country boy, have only finite amount of anger and malice to work off, and I'd undoubtedly take pity on the poor... souls, especially if they gave me reason to believe they'd learned the error of their ways and were genuinely sorry for what horrors they'd committed.
You see, I lack the godlike ability to hold a grudge for an eternity, or a deity's ability to take pleasure in the torment of any of my creatures, however vile they may have been. Then again, if I was omniscient I probably wouldn't have created any creatures that I knew ahead of time were going to be slavering monsters, so I couldn't be blamed for the way they turned out.
Truth is, I reckon I'd do what I actually did with designs of mine that didn't work out - I deleted them. I didn't keep them around to I could contemplate how much embarrassment they'd caused me, and how much abuse I took from colleages and customers because of how those evil designs failed, and the financial damage they caused, and how much profanity they inspired. I just made them cease to exist, and determined not to make those kind of mistakes again.
Of course, God can't do that, can He? Because... reasons. Infinite reasons.