Chinese phrase
没做好，我好失望啊！ méi zuò hǎo wǒ hǎo shī wàng a
Meaning
I didn't do it properly and I'm so disappointed!
When to use it
The speaker did something poorly and feels disappointed. It is used for a task or attempt that did not turn out well, often with a personal, expressive tone.
Example dialogue
作业做好了吗？ zuò yè zuò hǎo le ma
Did you do your homework properly?
没做好，我好失望啊！ méi zuò hǎo wǒ hǎo shī wàng a
I didn't do it properly, and I'm so disappointed!