ناامید کننده in English:

I am the Flying Spaghetti Monster. Thou shalt have no other monsters before Me. (Afterwards is OK; just use protection.) The only Monster who deserves capitalization is Me! Other monsters are false monsters, undeserving of capitalization.

It was disappointing that nobody ate the expensive sushi I had served.

Last night's concert was disappointing.

The result proved disappointing.

I know he will only continue disappointing me, but I can't help loving him.

To sum up, we can say that his new novel is disappointing.

Nothing is more disappointing than to lose in the finals.

A blanket of silence fell over everyone when they heard the disappointing announcement.

Corporate earnings for the first quarter were disappointing.

The game ended with a disappointing score of 2–2.

Even taken on its own terms, the book is disappointing.

A disappointing baseball season usually means that your favorite team lost a lot of games.

It was disappointing not to win a medal, but I still made history!

The ​response to ​our ​advertisement has been ​somewhat disappointing.

The film was rather disappointing. I expected something much better.

The speaker didn't know his subject, nor did he speak well; in short, he was disappointing.