ابراز ناامیدی

That’s too bad.

How disappointing!

That’s so disappointing!

Oh no, what a shame!

It’s a great shame.

It’s a little bit disappointing, isn’t it!

It didn’t live up to my expectations.

What a pity!

What a letdown!

What a bummer!

That’s a nuisance!

I thought you could do better.

I’ve never been so disappointed in my life.

It wasn’t as good as I thought it would be.