Why does Holden say he's 'sort of glad they got the atomic bomb invented'?

Holden Caulfield expresses being "sort of glad they got the atomic bomb invented" as a reflection of his deep sense of disillusionment and despair about the world. He feels that if the world is inherently flawed and phony, then it might as well end in a dramatic way. This statement also underscores his struggle with feelings of hopelessness, as he grApples with the complexities of adult life and the potential for destruction that human beings wield. Ultimately, it highlights his desire for authenticity in a world he perceives as superficial.