Why is the time I finished it snowed so much that you could barely tell did any a metaphor?

The phrase "the time I finished it snowed so much that you could barely tell I did anything" is a metaphor because it is using figurative language to describe the speaker's feelings of exhaustion and futility. The speaker is saying that they feel like they have worked hard on something, but that their efforts have been in vain. The snowstorm represents the obstacles that the speaker has faced, and the fact that it has snowed so much that you can barely tell that the speaker did anything represents the speaker's feeling that their work has been erased. This metaphor is a powerful way of conveying the speaker's sense of frustration and defeat.