Victor has no opportunity to conceal his creation of the creature because everything happens too fast, so he comes across as more heroic. In the novel, the monster extracts a promise from Victor to create a bride for him. He agrees at first, but at the last second changes his mind, refusing to inflict another hideous wretch such as this upon the world. Despite this promise, Victor marries Elizabeth, never once telling her that a huge, superstrong creature has threatened to crash the party, so to speak. And sure enough, on their wedding night, the monster comes in and kills her.
Victor refuses then to complete the work, and only for that reason.
Then there's the whole sequence where Victor tries to reanimate Elizabeth, as Branagh tries to work The Bride of Frankenstein in for no compellingly good reason. And, to make matters worse, the monster's story is the one that's short shrift. The whole reason why the monster becomes so miserable is because everyone thinks he's some huge lumbering thing that no one can stand to look at. But when he first stumbles through Ingolstadt, the villagers assume he's a cholera victim, and attack him for that reason. Victor doesn't react to his hideousness hardly at all.