それは無駄になった。の英語

It came to nothing.

it was all for naught

It has resulted in nothing.

That will all be wasted.

That will all become a waste.

That went away.

That went out of fashion.

It was a wild goose chase.

I got tired of it.

I got sick of that.

It fell to pieces.

I started to hate doing that.

That was insincere.

That broke.

It came apart.

It's broken.

That has vanished.

It vanished.

This is broken.

The price of that was dropped.

It's been stolen.

That was freed.

That has been sold out.

It's broken.

That's broken.

That is broken.

That had gotten old.

That ran.

I missed [didn't notice] that.

That escaped my notice.