Why does luke feel bitter in the lightning thief in chapter 7?

In Chapter 7 of "The Lightning Thief," Luke feels bitter due to his deep-seated resentment about his own circumstances as a demigod and his experiences at Camp Half-Blood. He perceives the camp as a place that restricts freedom and perpetuates a cycle of abandonment, especially since many demigods are left to fend for themselves. Additionally, Luke's bitterness is amplified by his feelings of being overshadowed by the expectations placed on him and the perceived favoritism shown to others, particularly towards Percy. This sense of injustice fuels his growing discontent and desire for change.