Zdziwienie
I was surprised / amazed / astonished to hear that you had left Glasgow.
To my surprise / amazement / astonishment she agreed without a murmur.
He was thunderstruck / flabbergasted / dumbfounded when he discovered his best friend had tricked him.
I was stunned / shattered by the news.
The news was quite a shock / a bombshell / a bolt from the blue / took us all by surprise.
The building of this ship was a staggering / an astounding achievement for its time.
The combination of a yellow shirt and pink trousers was rather startling.

Rozczarowanie
The failure of the project was a bitter disappointment / a heavy blow / a serious setback for him.
His hopes were dashed when his request was refused.
We were bitterly disappointed / sick with disappointment / dismayed / (completely) disenchanted.
I felt (badly) let down / betrayed when he went back on his promise.
Our annual profits have not come up to / have fallen short of expectations.
They all looked dejected / crestfallen / [infml] down in the dumps after their defeat.
All our attempts to combat environmental pollution have been frustrated.

[infml] - nieformalnie