But for your help, I might have failed.

假如没有你帮忙，我兴许会失败。

《新英汉大辞典》

I might have failed but I am not a failure.

失败并不是意味你是一个失败者，它只意味着你还没有成功。

youdao

I didn't find anything relevant on Google, I might have failed to choose the appropriate wording.

我没有找到任何相关的谷歌，我可能没能选择合适的措辞。

youdao

And if George or Tom got a ninety-eight then I might as well have failed.

NEWYORKER: The Operator