Krishna: Lets start with bad boy Krishna, whom all the ladies seem to love (and its just bonus points for him that he is good looking) but to be honest because he is hot and looks like a hero many of us support him. Not taking out our own shallow perspectives, imagine Angad was the lead of this show, I am pretty sure he would have gotten disgusting, loser much earlier. Its a basic fact of psych, people tend to be swayed by better looking people.
Looks aside, we have to look at his socialization, as cliche as it sounds, the apple does not fall from from the tree. Prime example of this- Krishna! From a young age, a child imitates the behavior he sees in his parents because they are the prime socializers, picking up cues of how to run in a normal society. The children that come from deviant homes then have deviant upbrinigings and their "normal" is actually not normal.
Thirdly, Krishna is a obsessive maniac, but he views this as love. For someone who knows no different, this will be his definition of love, because in his eyes he is doing all of these things. He is not looking at her perspective.
BOTTOM LINE: THIS DOESNT MEAN ANY OF HIS ACTIONS ARE JUSTIFIED OR OKAY...IT JUST MEANS THAT NOW WE KNOW THEY ARE A PRODUCT OF HIS ENVIRONMENT.
Pratigya: Moving on, she really does have no real fault, we all know how he started to harass her family etc.
She is the model child for psych adapting to the environment model, which a lot of posts are asking her to do...and yes according to psych humans are the only species in the environment to be able to adapt so quickly to change BUT (the big but) is if they know that change was inevitable like someones death. Not when they are forced into the situation like Pratigya was.
Neways just some psych.