anticlimax+10

Anticlimax is an event, conclusion, statement, etc.,that is far less important, powerful, or striking than expected.

"Her husband, among various physical accomplishments, had been one of the most powerful ends that ever played football at New Haven-a national figure in a way, one of those men who reach such an acute limited excellence at twenty-one that everything afterwards savors of anticlimax."

After the reality show was over, the star may find his life of loneliness an anticlimax.