disservice
//dɪsˈsɜːvɪs//
Noun
disserviceSingular
disservicesPlural
1
A harmful action or an act that causes damage or disadvantage to someone or something.
By not telling her the truth, you are doing her a disservice.
2
An action that is intended to help but actually causes harm or inconvenience.
His attempt to help actually did her a disservice by making the situation worse.