When, how and why did Victor Frankenstein fail his creature in the novel Frankenstein?

Much of Frankenstein criticism focuses on Victor Frankenstein and his abandonment of his creation, the Creature. Victor abandoned the Creature once he saw it. In volume one, chapter 5, Victor states, "Unable to endure the aspect of the being I created, I rushed out of the room." As the text continues, the Creature finds Victor, and mumbling, Victor runs away again. Victor's hostile and negative reaction toward the Creature was simply because the Creature did not look like or turn out as Victor had imagined. This abandonment of the Creature can be compared to a parent giving birth to a child, then abandoning it, which is essentially what Victor did. Why did Victor do it? Was it ego? fear? Most likely both and more. Victor's desire for power and control overtook him, and as the story continues, one could argue that the Creature's demise was because Victor had abandoned him at his most vulnerable time.