What emotion did Zitkala-Sa express when the students had to follow rigid dining rules?

Zitkala-Sa expressed anger and frustration when the students had to follow the rigid dining rules at the boarding school. She was disturbed by the strict, unnatural behavior that was imposed on them, such as having to sit silently and eat without any expression of enjoyment. This was in stark contrast to the more free-spirited and communal meals in her native Native American culture. Zitkala-Sa felt humiliated and upset by these rules, as they represented the forced suppression of her cultural identity and traditions.

This question related to Chapter 6 English Vistas Class 12th NCERT.
From the Chapter 6, Memories of Childhood.
Give answer according to your understanding.