Why does frnakenstein feel he has the right to take the life o his monster?

Frankenstein believes he has the right to take the life of his monster because he views the creature as a threat to humanity and a source of his own suffering. He feels responsible for the havoc the monster has caused and believes that eliminating it is the only way to protect himself and others from further harm. Additionally, Frankenstein grApples with feelings of guilt and regret for creating the creature, which fuels his desire to destroy it as a means of reclaiming control over his life and actions.