Emmad butt in one of his bts (i think it was ahsan kidnap hone wala one) said the name of the show is kaisi teri berukhi.. and then put a caption saying its changed to kaisi teri Khudgharzi..
So berukhi is basically like indifference or aloofness cuz of anger..
From the pov of the plot i think thats an interesting point to think ki kaun kis se berukhi hota hai .. mehak ka samjh aata hai. But i feel this show is not just mehak's pov. Shamsher ke angle se i think its towards his father. And from dilawar its to the two of them cuz they get married. Also, i wonder if Shamsher will move away from mehak at one point and she feels his berukhi here. Like how in the ost at one point it feels like shamsher also says mujhe bas door jana hai.. cuz i think he understands he is the bad element and threatening element in her life.
For now i haven't exactly got the idea..but this is what hits at first. And when the show was titled ishq junoon i think that is showing right from the first epsiode itself, even Shamsher redemption time will be ishq junoon itself ..
But yeah it does fit somewhere in the plot which is why they had it in the first place at one point in time.. this whole berukhi word and probably it didn't make a good ost so they made it Khudgharzi..