YOU SAID:

the hardest part, the awful things that I've seen

INTO JAPANESE

最も難しい部分、私が見たひどいもの

BACK INTO ENGLISH

The hardest part, the terrible thing I saw

INTO JAPANESE

最も難しい部分、私が見た恐ろしいこと

BACK INTO ENGLISH

The hardest part, the horrible thing I saw

INTO JAPANESE

最も難しい部分、私が見た恐ろしいこと

BACK INTO ENGLISH

The hardest part, the horrible thing I saw