ANTICLIMAX

[noun] - an event or experience which causes disappointment because it is less exciting than was expected or because it happens immediately after a much more interesting or exciting eventWhen you really look forward to something it's often an anticlimax when it actually happens. [C]Coming home after a trip somewhere is always a bit of an anticlimax. [C]The concert was something of an anticlimax because the star soloist never turned up. [C]Even when you win a match there's often a sense of anticlimax - you always feel you could have played better or got a higher score. [U]