Exactly! because at the end of the show, they have to show didi as the protagonist so all characters at one point or the other will be butchered, be it Virat, Sai, or Samrat. The end seems to be decided that didi is the one who tolerated so much, got victimised, didn't get her one true love, had a husband who disrespected her, couldn't bear children, his former lover's wife always taunted her, she didn't receive acceptance from the whole family and the list goes on...đ
At the end of the show, she will become the "mahaanta ki murat" by reuniting Sairat and all her doings will be whitewashed and forgotten and if am not wrong the entire blame will shift on Sai for not trusting her husband enough. the same husband who keeps making commitments to other's wives at the expense of destroying his own relationship. đ¤˘
So basically yeah, all other character butchering happens because they need to be dropped down way below didi's level so that didi can be clean wiped in the end.
Asmi will be able to explain more thoroughly the character shift of characters as she is our source of information from KD. đ
