YOU SAID:

なにひとつ守れやしない

INTO JAPANESE

なにひとつ守れやしない

BACK INTO ENGLISH

So one can't defend

INTO JAPANESE

一つを守ることができないので

BACK INTO ENGLISH

Because you can't keep one

INTO JAPANESE

1 つを保つことができないので

BACK INTO ENGLISH

Because you can't keep one