Reincarnated Villainess Isekai is sort of a trope these days, but I like how they executed this. Instead of the person being reincarnated as the mc and the defacto narrator, it instead chose one of the "side" characters of the world, i.e. the Prince. It's actually a refreshing perspective and makes the world feel more like "real world" instead of the "fantasy world". These isekai genre ususally are written as a sort of fulfillment fantasy, making the mc become super important and powerful and generally drive the actions and plot by being op in either knowledge, power or both. The "Villainess" certainly had knowledge, but had no sense of how to use it to improve things, and had in fact decided to do the opposite. She was so scared of a "bad end", she never even considered making changes or improving things. It was the "target" Prince that drove the story and acted upon the knowledge gained.