Employing Ghislaine Maxwell has to top the list. Changing their community rules definition of hate speech to only be against chosen groups has to count too. But there’s a lot of bad stuff that redditors quietly accepted, forgot, or newer members never heard of.
I’ve heard that this was back in a time when you could promote a user to mod status without their permission. Unless there is evidence that he actively participated in the sub, I think we have enough reasons to dislike him without trying to smear him with something that has questionable relevance.