mismanage
Definitions
To manage or handle something poorly, inefficiently, or dishonestly.
To administer or organize affairs in a way that leads to failure or waste.
Examples
The new CEO was fired after he continued to mismanage the company's finances.
If you mismanage your time during the exam, you will not be able to finish all the questions.
Synonyms
mishandle botch bungled misconduct misdirect maladminister fumble