mishandling
mis-han-dling
verb
Treating something or someone badly, carelessly, or incorrectly.
"He was accused of mishandling the evidence."
noun
The act of treating something or someone badly, carelessly, or incorrectly.
"The report detailed the mishandling of patient records."
Thesaurus
Synonyms: misconduct, mismanage, mishandle, spoil, screw up, fuck up, fluff, botch, ball up, flub, botch up, bollocks up