The main reason is that the monster had killed Victor's family and his love so, he shunned the monster.
EXPLANATION:
'Frankenstein' by Ricky Gallo is a horror genre of literature. It is a story of a boy, Victor who thinks of creating himself from the body parts of others, thinking of creating something beautiful. But in turn, he was horrified to discover that a completely different creature got created.
He felt sorry after knowing this fact. Also the monster is ignored and rejected by the society.This in turn makes the monster to attack everyone in the society that includes the attack made over victor family and her love. Thus, instead of blessing Victor as his creator the monster attacked and killed the peoples of his creator makes him to shunned the monster.