Because our morals subconsciously make us like positive characters more. I like jhanvi and find her revenge completely justified, but that doesn't mean all her actions aren't questionable. Her having previously said that even if dhruv and kabir die in her games so be it, her actions against kavya, giving wrong medicine to suman and now the school admission thing are actions that I find questionable of jhanvi.
this is what I said previously in a post she sid that she likes arush and he's a child must be kept away from all these problems etc but when time arrived she did not refrain from calling the principal though Arush told her about him not liking school she should have explained him instead , here it looks that the child is more sensible than her he told her he wanted to meet her but no one let him in, he tried to make her forget her pain...then??
Why she wants to kill all innocent people except for PK mittal Suman Chanda and PK father whom she thinks they were together...that's fine.