to say the least
US /tə seɪ ðə liːst/
UK /tə seɪ ðə liːst/

1.
setidaknya, paling tidak
used to indicate that one is understating something, or that the reality is more extreme or significant than what is being explicitly stated
:
•
The meeting was chaotic, to say the least.
Rapat itu kacau, setidaknya.
•
His performance was disappointing, to say the least.
Penampilannya mengecewakan, setidaknya.