我的字写得很差，使老师们感到十分失望。

My handwriting was the despair of my teachers.

《牛津词典》

你做那样的事使我太失望了。

You let me down doing a thing like that.

《新英汉大辞典》

同事，你也需要练习拒绝别人提供的帮助并温和地使对方失望。

Also, you practiced refusing an offer of help and letting someone down gently.

youdao