Answer :
This question is about "CITR" by J. D Salinger Flashcards
Answer:
Holden hates it because it indicates that his future will not be easy.
Explanation:
Holden believes that wishing good luck on leaving is a bad omen and he hates it when they do this to him. That's because he says that when someone wishes good luck it means that the future that awaits them will not be easy and comfortable. If he needs luck it means it will be difficult, dark and dangerous and he doesn't want to go through it.