Victor Frankenstein was a scientist who sought to create life but inadvertently created a monster.
the monster did not have bolts in its neck, it could speak very well once it learnt, it did not eat brains but ate as a normal human eats and was only called a "monster" because it murdered victor frankenstein's family.
Victor betrayed it essentially, which led to it murdering his family to seek revenge. The monster was made of human body parts and was meant to be beautiful. However, for whatever reason it didn't go to plan, but it was not reanimated by lightning, just simple electricity (Galvanism)