Exactly, I'm not blaming the writing which is why I added "I felt". It was clearly what I felt.
I think it was because, R went back to how he used to be, erasing P completely from his life, and he used to be alone and longing. And here P, she also forgot about R, like he never entered her life and with Mandar, her happiness returned. So that's why I felt that P was painted bad here.