I did think Victarion's actions as of late have been pretty evil, but also, it's a bit more than that. His actions lie more along the lines of misguided religious interpretations. He is continuously mentioning how he wished Damphair was with him so he could get help in understanding things, and when he has the maester killed and the ship with the girl burned, he uses religion as his reasoning, but perhaps the underlying basis would be that he's uses that as a cover for his own evil tendencies.
how the heck is Vic more evil than the Mountain. The mountain gang raped little girls, smashed baby's faces into walls, and does it all for the fun of it
If we had Gregor's POV, I'm sure we'd have a different opinion. Gregor suffers from terrible headaches which clearly affect his reasoning skills. Gregor always reminded me of the Outsider by Lovecraft - http://en.wikipedia....r_(short_story)
Victarion might have his own moral code, but he still does awful, evil things.
Gregor could have a moral code - is he any different than a bear that's lost some fur?
Does Ramsay do everything he does to gain Roose's approval?
Ultimately, it doesn't matter - they're all horrible and their behaviour can't be justified at all.
But they all pale compared to the evilness of Bonifer Hasty.