The female protagonist is a very OP character with unimaginable power and support (not to mention undetected spies and weapons everywhere), yet somehow she managed to get herself set up by her not-as-smart sister that easily led to her death.

There's also the fact that people directly compare her before-after the accidents and soul transfer like it's a very obvious thing needed to be mentioned. I've read a lot of reincarnation novels, but this one really takes the cake.

I mean, how come the one thing that others think of after the accident was comparing her to a 'before' point and repeatedly mention she's changed or posessed?

I don't know about you, but if a person was to fall and have unfamiliar demeanors, I won't notoce it right away, and when I do, I'd think her head'd gone a little crazy (The Eight Year-Old Princess: Phoenix Reborn did a very good job in this) or it's just a temporary effect of the accident--not immediately take extreme precautions and try to kill her off after!

Not to mention the extremely weak plot of other jealous children-wives that want to kill her off yet are very tactless in doing so, making a fool of themselves repeatedly with the same pattern without any clear motive except 'I'm jealous' of her status as the main family daughter. I mean, please, the 'before' her was portrayed to be a boorish idiot child (again, very bad character setting) neglected by her family--what is there to be jealous about?

It's like reading Nobita who always comes to Doraemon and ask for his things though we all know it won't end up well.

We didn't even get to the fact of the protagonist's supposed romance with ML, which happened absurdly fast with him investing hard in FL from the moment she changed character, calling her the future bride and giving maximum protection with his bodyguard from the start though they barely know each other.

She gets her second chance with "the enemies" still being alive, but its a different body 5 years later. It seems like her first life she practiced martial arts but her focus was being a wife and empress. However, it seems like the direction of her second life will focus on cultivation and martial arts. This is only my assumption based on minor clues given in first 4 chapters and plot summary.