why does it happen???

why does it happen that every time I start sympathising with Tapasya and try to justify her actions, she turns genuinely EVIL and HORRIBLE all over again??? now she has finally admitted that its not Veer's love that she is doing all this for but just to make Ichchha's life miserable forever😡😡😡

because that's her nature ...
without making iccha's life miserable she cant stay happy - her main objective of life 😆