Frankenstein had created something no one else has ever, but in the end, he didn’t love it. When Victor was done with his creation he had immediately came to the realization “How can I describe my emotions to this catastrophe or how to delineate the wretch whom with such infinite pains and care I endeavored to form.” Frankenstein abandoned his creation not even giving the monster a chance to show that he was worthy for his master.
It withdraws the monster into a state of isolation and utter misery, but this in turn leads to the development of an intense hatred and a desire for revenge. The Monster does everything he can to make Frankenstein's life as difficult as possible, to make his creator feeling miserable and lonely. When he runs across Frankenstein's younger brother, William Frankenstein, in the jungle, he kills him right away when he realizes who he is. The monster begins to behave like a true monster at this stage. He assassinates someone who is connected to Frankenstein in some way. He needs Victor to experience isolation in the same way that he does. Until the end of the book, the creature kills almost all of Victor’s loved ones: his best friend Henry Clerval and his wife Elizabeth.
At the end, the creature does not benefit from his revenge. None of his problems are solved as a result of his revenge. He is still lonely and abandoned by society. On top of that, he is left even more miserable than he was in the beginning.