You can't blame the Hollow Men for being dissatisfied. They are trapped in the desert on the bank of a river they can't get across. In fact, you would expect them to be even more ticked off than they are. But quite frankly, they can't even muster the enthusiasm to complain. They try not to say anything at all. (When you don't have a proper soul, it's harder to get worked up about soul-crushing misery.) The Hollow Men are like the souls in Canto 3 of Dante's Inferno, who are so bland and cowardly that they are excluded even from the fantastically grotesque torments of Hell.
The Hollow Men do not realize how unhappy they are because they do not understand the joys of Heaven enough to know what they are missing.
The Hollow Men understand the joys of Heaven at an emotional, but not an intellectual, level. Thus, they are deeply unhappy as they intuit their damnation but cannot explain it.
The Hollow Men have a bad case of "the Shadow." Like when you sit down to do your homework, and you can't bring yourself do open your book, you too can blame the Shadow. But the Hollow Men have it even worse. They can't even respond to their own emotions. The Shadow represents their cowardice and the failure of their will. They can't even look the "eyes" in, well, the eyes. They turn around and around like the wind and wait on the bank of a river.
The Hollow Men have been damned for their cowardice and weakness of will, symbolized by "the Shadow."
The Hollow Men are not morally worse than the "violent souls" of Hell, but they are more contemptible. They envy the violent souls for their ability to at least look goodness in the eye, even if only to spit on it.
The Hollow Men all speak as one because they have the same identity: an empty one. The words "hollow," "empty," and "stuffed" are repeated again and again. Though we think we're dealing with flesh-and-blood people who happen to be passive and wishy-washy, in reality we're dealing with an empty void disguised as a person. The Hollow Men perform ritualistic actions like prayer and have some emotions, like fear. It's important to remember, though, that they are incapable of normal human reactions. They can't finish anything they start. Back on earth, they might have been famous politicians or journalists, but now they're just shells.
The Hollow Men represent people who are more comfortable taking part in a mob mentality than in holding their own moral viewpoints. They are the ultimate example of "groupthink."
The Hollow Men do not completely lack self-knowledge. They see enough of their own condition and flawed ideals to be ashamed of themselves. Otherwise, they would not be afraid to look at the "eyes."
At several points in the poem, the Hollow Men express vague hopes of being rescued by "the eyes." Do they think that the souls with eyes will come back on the last day of history and pluck them off the river to live among the stars? We don't know, but somehow we don't count this outcome as very likely, particularly when they are so afraid to meet the eyes even in their dreams. The stars represent the hope of salvation, but they grow dimmer and will probably be gone soon. The Hollow Men have no concrete plans and can't even finish a simple prayer.
"The Hollow Men" is slightly more optimistic than Dante's Inferno because Eliot suggests the faintest of hopes that these lost souls might still receive God's grace, though they do not deserve it.
"The Hollow Men" are "blind" because their spiritual vision remains fixed firmly on the past, on their "lost Kingdoms."
In Canto 3 of Dante's Inferno, Dante's guide Virgil explains that some souls are not accepted by either Heaven or Hell. They didn't do any good in the world, but they didn't actively work against the forces of good, either. They just ignored the universal conflict between good and evil and drifted around aimlessly, pursuing their own empty interests and desires. Dante felt that much of humanity fit into this category. It seems like the Hollow Men are clearly meant to fall in a similar category. They are stuck on the bank of the River Acheron and cannot cross over into death, even though they are dead themselves.
The Hollow Men have no hope of ever crossing the River Acheron. They wait in vain without realizing it.
The Hollow Men have not been exiled from either Heaven or Hell except insofar as they have exiled themselves by forfeiting their humanity. They cannot achieve either salvation or damnation because they are not fully human.