YOU SAID:
he failed very poorly
INTO JAPANESE
彼は非常にひどく失敗した
BACK INTO ENGLISH
He failed very badly
INTO JAPANESE
彼はひどく失敗しました
BACK INTO ENGLISH
He failed badly
INTO JAPANESE
彼はひどく失敗した
BACK INTO ENGLISH
He failed badly
That didn't even make that much sense in English.