Béo chê ngấy, gầy chê tanh

Direct English translation

The fat one says it is greasy, the thin one says it is fishy.

Equivalent English version

You can't please everyone

Giải thích tiếng Việt
Chỉ thói hay chê bai, kén chọn, việc cũng có thể tìm cớ để không vừa ý. Thường dùng để nói người khó tính, khó chiều khó làm cho hài lòng.
English explanation
Refers to people who always find something to complain about and are hard to satisfy. It is used for someone who is overly picky, fault-finding, or difficult to please.