It was all for naught?
→ 헛수고였던 거야?

[예문]

A: I was roused from sleep by a banging on my door.
A: 문을 쾅쾅 두드리는 소리에 잠에서 깼어.

B: Was it someone going door-to-door? That's a hard job.
B: 누가 집딥마다 다녔나? 쉽지 않을 텐데.

A: By the time I crawled out of bed and got to the door, no one was there.
A: 침대에서 겨우 기어 나와서 문을 열어보니, 아무도 없더라고.

B: So it was all for naught? I'd be livid!
B: 그래서 헛수고였던 거야? 나 같으면 엄청 열받았을 거야!