How does John's revulsion against everything in the world state reach its limit in the hospital for the dying?

Like maggots
they had swarmed defilingly over the mystery of Linda's death,  Maggots again, but
larger, full grown, they now crawled across his grief and his repentance.  He halted
and, with bewildered and horrified eyes, stared round him at the khaki mob, in the midst
of which, overtopping it by a full head, he stood. 'How many goodly creatures are there
here!' The singing words mocked him derisively.  'How beauteous mankind is! O brave, new
world....'

John's
disillusionment with the New World, does, indeed, culminate in the Park Lane Hospital as
the contrast between his true humanity and genuine emotion is set against the
manufactured humanity of the Deltas who swarm around him.  John realizes that Linda had
"been a slave." There is no freedom in this new world from which his mother has come, a
world in which the soul has been poisoned by conditioning and
soma. 

In a final heroic effort, as a
culmination of his revulsion against the New World, John tries to free the Delta's from
their servitude, but the riot police subdue this short-lived revolution.  Having been
defeated in his efforts to change the inhabitants of the New World, John is past his
revulsion and only wishes for an escape in order to preserve his own soul. He asks to
live out his own life in peace, but when photographers and curiosity seekers invade his
solitude, John despairingly kills himself, as he, too, becomes a victim of the "brave
new world."