what quality in young frankenstien proves to be his tragic flaw later in life?

If we go back to Shelley's original subtitle to her book we would see ‘The modern Prometheus’. Frankenstein parallels the myth of Prometheus stealing the gift of fire from the Gods and unleashing it on mankind. Similarly Victor goes beyond the boundaries of science to create something that only God has the right to. Once he creates his creature, he unleashes it upon the world. Victor's tragic flaw was to play God and not accept any of the responsibility for what he had done.

He is pxtionate