You're wrong actually.
Took me some digging but back in ch 21 when Renee sums up the content of the novel's vol 1:
Most of the things in the book she's found out already (Isir and Lian were politically engaged, Lian and Renee were friends, Renee was basically played into being the villain)
And more importantly BOTH Lian AND Renee are protagonists of the novel (well, Yiyoung too but she's in denial about that bit)
So even in the OG story Renee was pretty standard misunderstood/neglected OI FL.
Which means fixing her reputation is within the standard plot development of villainess reincarnation story.
On the chapter:
The dad already jumped, he jumped off Renee boat.
So let him swim with the sharks.
Yes, I do remember that OG Renee is just putting on a "show" because she was already looked down from being "Marcias' 'disgrace'".
Still, it shouldn't change the fact that, for what we know at this point, the author specifically wanted Renee's character to be the hated one (at least by the other characters). Yet the system wants the opposite....like it is for every story where the villainess is one of the main characters (we can look at a lot of stories, the genre is growing, almost booming).
Anyways...yeah, they'll all get what they deserve...still, it kinda pisses me off that a piss-poor nobody of a knight talks like that to the noble he should protect, or that failure of a father who is actually a "failure" of a swordman too since he's below the prince, the "commoner" and his son...and he still acts mighty lol