Why does Josh feed his anger on the night that he plans to leave his family in no promises in the wind?

In "No Promises in the Wind," Josh feeds his anger on the night he plans to leave his family as a way to justify his decision and cope with his internal turmoil. His feelings of frustration and resentment towards his family's struggles amplify his desire to escape, making it easier to rationalize his departure. This anger serves as a shield against the guilt he feels about abandoning his loved ones, illustrating the conflict between his aspirations and the emotional bonds he is trying to sever. Ultimately, it reflects his struggle for autonomy amid a chaotic and painful family life.