go through the mill
US /ɡoʊ θruː ðə mɪl/
UK /ɡoʊ θruː ðə mɪl/

1.
吃尽苦头, 饱受折磨
to experience a difficult or unpleasant period of time, often involving hard work or suffering
:
•
He really went through the mill during his first year at the company.
他在公司第一年真的吃尽了苦头。
•
After the divorce, she went through the mill emotionally.
离婚后,她在情感上饱受折磨。