bad, poor
My French is bad.
Но ваш план так же плох, как и ваша машина!
But your plan is as bad as your car!
— Приключения Паддингтона 2 (2017)
Да, а чем тебе Михалыч то плох?
Yeah, what have you got against Mikhailych?
— Dead Man's Bluff (2005)
He is bad at math.