not hack it

to be unable to work or deal with something effectively Most people think he just can't hack it in this business anymore.

Name	Pronounced	Usage
Maud	[mɔd]
Molle	-	Medieval English
Norah	NAWR-ə	Irish, English
Priscilla	pri-SIL-ə (English), pree-SHEEL-lah (Italian)	English, French, Italian, Ancient Roman, Biblical Latin, Biblical
Dotty	['dɔti]
GÖRan	YUUR-ahn	Swedish