On the other hand

I could also sympathise with the monster, he was created by victor. The monster was in some part like that of a child and did not know much better. When victor abandoned the monster, the monster was hurt and like any young mind he would like to gain revenge. So in some sense the cause to victors problem was himself he created a monster by abandoning it and enraging it aswell. If victor had only taken care of the monster and tought it to be a decent living creature he would not have gone on his killing spree.