apopoi's manga / #Treason(1)

What a typical shoujo revenge story. The story itself is like a staight up copy of other manhwas that includes time travel into the past or reincarnation, it was like exactly copy pasted straight from other manhwas. The half-sister is a realist, the fact that she admits that that trashy man only likes her now but as time passes he will miss the MC who had been by his side for 14 years, so inorder not to disrupt her future, she killed her little sis. Out of the multiple problems I have with this manhwa, the worst is probably the quick change in emotions like when she first saw Isabella, she was shaking and was afraid cuz she is face to face with her killer yet she's smirking and planning her revenge the next scene. When she saw the crown prince, she felt guilty and ashamed yet she convinces herself that it's all good cuz they are in the past and she hasn't killed him yet so she suddenly becomes easygoing and cracks jokes, like girly that's not how human psychology works? If it were that easy, would u have been so obssessive over that trashy man for 14 whole years..it's just plot convenience. I thought at least the art would be good cuz that's the only praise the commenters gave but it's lacking.. everything is so stale and it feels like a Chinese manhua rather than a Korean manhwa and that says a lot