If you describe something such as a reaction, treatment, or result as undeserved, you mean that the person who experiences it has not earned it and should not really have it.
Douglas has an undeserved reputation for being dull and dry.
Jim's treatment was harsh and undeserved.
undeserved in British English
(ˌʌndɪˈzɜːvd)
adjective
not earned or merited; unwarranted
an undeserved reputation
Examples of 'undeserved' in a sentence
undeserved
Pards knew he had just bagged one of the luckiest, undeserved wins of the season.
The Sun (2012)
Yet research has suggested that testosterone's bad reputation is largely undeserved.
Times, Sunday Times (2009)
That was always an undeserved reputation, based on her efficient technique.
Times, Sunday Times (2007)
I just hope this unexpected and undeserved defeat will not take any more confidence away.
The Sun (2009)
My -- undeserved -- reputation as a dog expert spread further too.
Jan Fennell FRIENDS FOR LIFE (2003)
Yet not all experts are convinced, and some are expressing concern that the plank's reputation is somewhat undeserved.
Times, Sunday Times (2016)
The Owls keeper was simply unbeatable, making stunning saves in both halves to grab the home side an undeserved point.
The Sun (2014)
From this period, the last twenty years of his life, he gained an unenviable and undeserved reputation for being disagreeable and dishonest.
Stewart Lamont WHEN SCOTLAND RULED THE WORLD: The Story of the Golden Age of Genius, Creativityand Exploration (2002)