I see where you coming from. I also like villains keeping true to their standards, coz the "everyone is nakama, even enemies" kinda annoyed me more than once.
I still dislike Sh!tsette, but I also appreciate the fact she doesn't needlessly/forcibly waver toward the "surprise motherkvcker I'm also a nakama in hiding"
Spoiler!
e.g.: when Lelouch vi Britannia was revealed as "I played bad guy to unite people so I'm a hero in hiding", rather than feeling in "awe" I felt disappointment ; on the other hand I really appreciated the miserable end that struck Light Yagami.