do more harm than good

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do more harm than good

To exacerbate the problem, rather than making it better, often in the process of trying to help. I'm worried that I did more harm than good by applying that tourniquet by myself. I should have just waited for the paramedics to get here. Doug means well, but he usually does more harm than good when he tries to help with the sorting.
See also: good, harm, more