幫倒忙

你這樣做是幫倒忙，讓事情變得更糟了。

What you did was more of a hindrance than help, it made things worse.

謝謝你的好意，但請不要幫倒忙。

Thanks for your good intentions, but please don't make things worse.

他想幫我搬家，結果幫倒忙，打破了好幾個碗。

He tried to help me move, but ended up making things worse by breaking several bowls.