Dazai sends Akutagawa on some errands, but despite his best efforts, he doesn’t seem to have what it takes to go shopping.
When they say, "wouldn't even kill an insect," 
it's just a figure of speech.
.عندما نقول "لا يستطيع قتل حتّى حشرة"، فهو ما إلّا تعبير مجازيّ
Dass man keiner Fliege etwas zuleide
tun könnte, ist doch nur eine Metapher …
dire de pas tuer un insecte,
c’était une façon de parler.
"Non fare del male nemmeno a una mosca"
è solo un modo di dire.
Quando dizem "não mate nem um
inseto" é apenas um modo de dizer.
«И мухи не обидит» —
это просто фигура речи.