The whole Kapoor Khandan, and everyone who is related to them or is friends with them are so unthankful to Kkusum.
Let's start off with Nikita. Now this is way before when the serial had just started. Kkusum had just got married to Abhay. Lalit was having an affair with Nikita, but didn't want to marry her anymore. Nikita then faked a pregnancy, and went to Kkusum to seek help. She told her that she was pregnant and that she wanted to give her baby Lalit's name. Kkusum convinced everyone in Kapoor Khandan and finally they agreed for Lalit and Nikita to get married, only to save the family's respect. As soon as she entered the house she went against Kkusum, plotting schemes against her and always trying to get her in trouble, when it was because of her that she was even in that house. The family was ready to kick Nikita out before her marriage with Lalit, because they thought maybe she was lying (and she was), but Kkusum reminded them that she was carrying this family's baby.
Next in line is Abhay. Well, from the beginning till when Kkusum marries Siddharth, Abhay was selfish and was unthankful to Kkusum. She married him, only thinking that he loved her when he really didn't. She found out that the only reason why they got married was because of a Kundli that said that Abhay's life was in danger and only Kkusum being there with him could save him. She still stayed with him and tried to make the marriage work. But because Abhay thought he loved Esha, he had an affair with her. Then he left Esha, only because Kkusum was pregnant and at that time he was at a stage where he couldn't have children because of an accident. But that was obviously cured…but when Kkusum has the miscarriage Abhay goes back to Esha. Then Esha leaves him and Kkusum marries Siddharth. It is then when Abhay realizes how much he needs Kkusum. After that Abhay was a very good person to Kkusum. After that he has never betrayed her, nor has he ever left her side.
Next is Mahi. Kkusum was told by a doctor that she was unable to conceive due to a miscarriage. But that doctor was paid by Esha. Then Kkusum brought in Mahi. Kkusum thought that Mahi was the type of person who only cared for money, and she was, until she fell in love with Abhay. Then all the drama started. Kkusum thought that Abhay was cheating on her with Mahi due to past experiences, so she left Kapoor Khandan and left for Ludhiana. And due to a train accident Abhay thought that Kkusum was dead, because he found her suitcase and her clothes at the site. Mahi and Abhay don't marry in this time. 18 years later Mahi sees Kkusum and finds out she is alive. She wants to go tell Abhay but later on realizes how much that will ruin her life, so she stays mum. Finally, with Kali taunting them to get married, Abhay and Mahi marry. Kkusum comes back after that and Mahi thinks she's back to get Abhay back. She fakes her death and now she's back saying that Taashu kidnapped her. Now she's saying "Kkusum took my husband away from me"…"Boo hoo no one loves me"…when Mahi was the one who took Abhay away from Kkusum…she's also unthankful to Kkusum because in the beginning when she came no one liked her, but it was Kkusum who told everyone what a good person she is and it was only because of Kkusum that she was in Kapoor House.
Next is the Mahi carbon copy, Kali. She's the same. It's only because of Kkusum that she's even alive. And she's got such a great sister named Kumud, who cares for her despite the fact that Kali hates her, and she knows it.
Next is Neelam. Kkusum was the only one besides Aryaman who was with Saakshi when Ajay Malia raped her. She was the only one who gave her support, and promised her justice. And Kkusum fulfilled her promise. Now Neelam's bahu is only happy because of Kkusum. She is relieved of all that trauma because of Kkusum. Her grandsons are alive because of Kkusum.
I know this is partially not true, but Sarla has also been unthankful to Kkusum. When all the proofs were against Kkusum in Sohan's death, even Sarla left her side. She should know that even proofs can lie. She better feel bad when Kkusum comes back. Supposedly Kkusum was her "beti"…so why didn't she believe her when she needed her the most?
ALL THESE PEOPLE ARE SO UNTHANKFUL! I don't know why they hate Kkusum so much. She's done so much for them…Why do they do that? Why don't they remember what she's done for them? Out of all these people, I'd say the best is Abhay because now he supports her fully. He's the only one who is with her besides Kumud…