In chapter 11 of The Kite Runner, the theme that Baba's pride and dignity has impacted him negatively is developed through his interactions with General Taheri. Baba is shown to be very proud and dignified, and he is unwilling to compromise his principles or beliefs for anyone, even his own son. When General Taheri asks Baba to help him find a job, Baba refuses, saying that he cannot help him because he does not believe in nepotism. This shows that Baba's pride and dignity are so important to him that he is willing to sacrifice his relationship with the General in order to maintain them.
Furthermore, Baba's pride and dignity are also shown to have a negative impact on his relationship with Amir. Baba is very critical of Amir and is constantly pushing him to be better, to be more like him. This puts a lot of pressure on Amir and makes him feel like he can never live up to his father's expectations. Baba's pride and dignity also prevent him from being able to show his love and affection for Amir openly, which further damages their relationship.
Overall, the theme that Baba's pride and dignity has impacted him negatively is developed in chapter 11 through his interactions with General Taheri and his relationship with Amir. Baba's unwillingness to compromise his principles and his constant criticism of Amir show that his pride and dignity are more important to him than his relationships with others, which ultimately leads to negative consequences.