I mean, the creature did murder his little brother, so I understand how one would land on "evil" as an assessment. Admittedly, this does not seem like Vic's chief complaint.
Right; he's got legitimate moral and personal reasons to not create the new creature, but he doesn't raise those objections when talking to the creature.
I like to imagine it’s not so much ugly as Victor is experiencing a proto-example of the Uncanny Valley. The creatures seem almost human, but then don’t move or look quite right and it’s setting off the lizard part of his brain.
