I don't know exactly who said it. It could have been a protagonist who came to this realization after going through a series of challenges and learning lessons about the futility of revenge.
One common theme is betrayal. In these novels, usually one of the characters in the relationship feels betrayed, which then triggers the need for revenge. For example, in a case where a partner has an affair before the wedding, the other partner might seek revenge during the marriage. Another theme is power struggle. In a marriage, there is often a fight for power, and when one side feels overpowered or mistreated, they may use revenge as a means to regain control. For instance, a character who has been financially exploited in a marriage might plan a revengeful act to turn the tables.
The art style and the unique plot usually contribute to making it stand out. The detailed and enchanting illustrations, along with an engaging story, can really draw readers in.
One reason it stands out is the detailed world-building and the unexpected turns in the plot. Also, the character development is really well done, making you root for the protagonist throughout the story.
One popular revenge wedding novel is 'Gone with the Wind'. Scarlett's journey has elements of revenge within the context of the tumultuous times and her relationships, especially when it comes to her marriages and how she deals with those who wronged her. Another one could be 'Jane Eyre'. Although not strictly a revenge wedding novel, Jane's strong will and her actions towards Rochester after finding out about his secrets can be seen as a form of standing up for herself in a relationship context. There's also 'Wuthering Heights' where Catherine and Heathcliff's complex relationship has undertones of revenge that are intertwined with the idea of marriage and love.
There was a story where the groom's ex - girlfriend showed up at the wedding. She didn't make a scene but instead gave a very heartfelt speech during the open - mic session. She talked about how the groom had once promised her the world and then left her for no good reason. She ended it by saying she hoped his new wife knew what she was getting into. It was a very subtle form of revenge as it made everyone at the wedding question the groom's character a bit.