The Genius “Incompetent” Woman Wants to be a Villainess ~a Lady who Married in the place of her Stepsister is Unaware of the Doting Duke’s Love Chapter 78 Discussion

Not really good, but not really bad either.

The story isn't great, but don't think too much about it. To pass a boring moment it's do the job, but you're searching for a story with developed characters and logic, that won't do.

The vilainess reputation

The protagonist here is send to marry a lecherous old dude to paid back the debt and misbehavior of her half sister that is the golden child. But the protag has no motivation to act as a "vilainess" at all. Her main goal is to escape her home, and that's done in chapter one. Her reputation is from her sister using her name when she has done bad thing. It would be easy now to just announce the truth now, even if people doubt it at first, time will help her. But no, even after her family is destroyed, she still acts as a vilainess for unknown reasons.

Mary sue

The protagonist describes as "naive", but I think she is more s*upid, unfortunately. While at the same time, she is supposed to be smart with an unparalleled memory.

There is nothing to do

I don't really get the point of the story, the protag has nothing to do with her family doom. The family was over indebted from the beginning, protag's money wouldn't have resolved anything, at best repel it a little. And since the protag was the person that keep the family's boat from sinking, they just sank faster.

Somehow, no one will notice

Also, people know that the protag have a sister and some even know the two sis look alike. But whenever they saw the "vilainess" protag, they all think she doesn't really fit her reputation, but no one connect the dot.