先天不足，后天失调
xiān​tiān​bù​zú​hòu​tiān​shī​tiáo

to be inherently weak and poorly raised

先天不足，后天失调 先天不足，後天失調 xiān​tiān​bù​zú​hòu​tiān​shī​tiáo
to be inherently weak and poorly raised
To be born with a weak constitution and suffer from poor health throughout life; used figuratively to describe a project or person that is problematic from the start and gets even worse over time.