I would refrain from using Louis CK as any sort of a moral compass. For obvious reasons.
Perhaps this is the case for me because what he did wasn't really messed up from what I know about the story, just weird.
I will concede that in some situations, and from my perspective these would almost entire involve sexual assault, I'd consider a person unredeemable.
You should probably go read up on what he did - pretty messed up power dynamics. (https://www.thecut.com/2018/08/what-about-the-careers-of-lou...)