not all it's cracked up to be
It is disappointing, it does not live up to its reputation, as in The restaurant wasn't all it's cracked up to be. This term uses crack up in the sense of “to praise,” which survives only in this expression. [Colloquial; early 1800s]
Not All Bad: 7 Ways “Bad” Can Be GoodPeople (and Thesaurus.com) have known for a while that sometimes being bad is really, really good—especially in the bad phrases below. Carry on.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.