The popular use of the word "immediacy" implies a direct and instant involvement with something. The word implies closeness and inclusion. In literature, immediacy refers to the condition of feeling so close to a certain experience that the medium disappears. For example, a painting looks so realistic that the person forgets he is looking at a painting, and not at the real object.
This passage could be considered an example of immediacy due to its vivid description. The image is so real and so mundane a person could imagine himself actually present at the scene, as opposed to simply reading about it.
It tells us that he is depressed and doesn't really know what he likes. He is immature, and seems to like to argue. He can't see the good in anything and Phoebe then calls him out on it. Hope this helps!:)
