Character created another person for the sole purpose of loving them but their creation doesn’t love them and instead chooses to forge a bond with their enemy.
A trope that explores that a creation is not a possession or extension of their creator but their own person who has their own thoughts and feelings that can actually be in complete contrast to that of their creators.
Smallville. Lex makes a clone of his brother Julian who died in infancy. The clone Grant Gabriel was meant to sooth the trauma and loss Lex had experienced by not only losing his real brother but also having distant and abusive parents. The clone gets tired of Lex’s demands and actually mocks him for being so lonely, sad and pathetic that he had to build himself a brother. The final insult is when the clone distances himself from Lex but wants to have a relationship with “their” father Lionel who shows contempt for Lex but gravitas towards Julian’s clone. Lionel and the clone bonding as father and son sets Lex off and he orders a hit on his brother’s clone as he would rather see him dead than be rejected in favour of “their” father.
Agatha all along. In wandavision Wanda was so unhappy and lonely that she magically bore twin sons Billy and Tommy to fill a void in her life and make her feel loved and needed. Wanda sacrifices the twins when she takes down her hex at her enemy Agatha’s prompting. Wanda goes insane and appears to kill herself because she can’t handle not having children to love her. However Billy who survived denounces Wanda as his mother and disregards her struggles. Instead he fixates on winning over Agatha’s affections. Billy follows Agatha around everywhere like he’s her surrogate son, cuddles up to her to tell her she’s not bad and even forgives her all her wrongdoings on behalf of her son Nicky in order to cement their coven 2.