After his little brother William, his best friend Henry Clerval, his beloved wife Elizabeth are murdered by the creature he created, his family friend Justine is falsely convicted and executed for the murder of his brother and his father dies from grief, Victor Frankenstein finally feels the need to take action to stop the murdering creature that he created:
As the memory of past misfortunes pressed upon me, I began to reflect on their cause--the monster who I had created, the miserable demon whom I had sent abroad into the world for my destruction. I was possessed by a maddening rage when I thought of him, and desired and ardently prayed that I might have him within my grasp to wreak a great and signal revenge on his cursed head. (Mary Shelley)
As he once was obsessed with creating life, Victor is now finally obsessed with hunting down and killing the creature he brought to life then abandoned and stood by in helpless agony and remorse as the creature destroyed his family. Don't you think he should have come to this decision as soon as he killed William? It would have made the whole story more suspenseful and exciting if he began the hunt right after William's murder as he fails to intercept him before each murder. How dumb was he to assume the creature's threat regarding his wedding night only endangered himself and not Elizabeth. Were all affluent 18th century men that wimpy and self-involved?