(n.) The act of freeing from an illusion, or the state of being freed therefrom.

bafflement balk ban betrayed hope blackball blackballing blasted expectation blighted hope blow buffet comedown complaint cruel disappointment dash dashed hope defeat dim view disagreement disappointment disapprobation disapproval discomfiture discontent discontentedness discontentment disenchantment disesteem disfavor disgruntlement disillusion displeasure disrespect dissatisfaction dissent distaste exclusion failure fallen countenance fiasco fizzle foiling forlorn hope frustration hope deferred indignation letdown low estimation low opinion mirage objection opposition opposure ostracism protest rejection setback sore disappointment tantalization tease thumbs-down unhappiness