YOU SAID:

i knew it would be bad but i had no clue it would be that dastardly

INTO JAPANESE

私はそれが悪いことになることを知っていましたが、それがひどいことになるだろうという手がかりがありませんでした

BACK INTO ENGLISH

I knew it would be bad, but I had no clue that it would be terrible

INTO JAPANESE

悪いことはわかっていましたが、ひどいことはわかりませんでした

BACK INTO ENGLISH

I knew it was bad, but I didn't know it was terrible

INTO JAPANESE

悪いことは知っていましたが、ひどいことは知りませんでした

BACK INTO ENGLISH

I knew it was bad, but I didn't know it was terrible