In Frankenstein, beauty is considered a virtue of the good, while deformity and ugliness are automatically associated with evil. Because of this stigma, the monster’s outward defects prevent him from gaining acceptance into a social sphere – even though he is full of compassion and goodness on the inside. Even the monster’s attempts to befriend a blind man fail because social stigma against ugliness is so deeply rooted here. This dichotomy of beauty and ugliness as related to good and evil stems from the book’s Romantic influences.
The monster is innately evil, but chooses to blame his evildoings on society.
The monster is not innately evil. He becomes evil only after society treats him like he is because his outward appearance is terrifying.