Word: disappointing
To sadden or displease (someone) by underperforming, or by not delivering something promised or hoped for. Example: His lack of respect disappointed her.
To deprive (someone of something expected or hoped for).
To fail to meet (an expectation); to fail to fulfil (a hope).
To show (an opinion, belief, etc.) to be mistaken.
To prevent (something planned or attempted).
Causing disappointment. Example: disappointing results / news; a disappointing experience
You can find a list of possible crossword clues for DISAPPOINTING below.