"Do not blame yourself, son, for Karna's death," said Kunti. "His father, the Sungod himself, pleaded with him. He begged him to give up the wicked-hearted Duryodhana and join you. I also tried to convince him. But he would not listen. He brought his end unto himself."
Her eldest living son Maharaj Yudhisthira said: "you deceived us, mother. By hiding the secret of his birth from us. You became thus the cause of this great sin. May women never be able to keep a secret henceforth."
This is Vyasa's story of how Yudhisthira cursed all women in his anguish over having killed his elder brother.
Mahabharata-Yudhisthira's anguish.