leave something to be desired

US /liːv ˈsʌmθɪŋ tu bi dɪˈzaɪərd/
UK /liːv ˈsʌmθɪŋ tu bi dɪˈzaɪərd/
"leave something to be desired" picture
1.

改善の余地がある, 不十分である

to be unsatisfactory or not as good as expected

:
The quality of the food at the restaurant left something to be desired.
そのレストランの料理の質は改善の余地があった
His performance in the play left something to be desired.
彼の劇での演技は改善の余地があった