YOU SAID:
i can't get caught lacking
INTO JAPANESE
足りないのは捕まえられない
BACK INTO ENGLISH
I can't catch what's missing
INTO JAPANESE
足りないものがわからない
BACK INTO ENGLISH
I don't know what's missing
INTO JAPANESE
何が足りないのかわからない
BACK INTO ENGLISH
I don't know what's missing
That didn't even make that much sense in English.