YOU SAID:

if this isn't funny i am going to be disappointed

INTO JAPANESE

これがおかしくないなら私はがっかりするだろう

BACK INTO ENGLISH

I will be disappointed if this is not wrong

INTO JAPANESE

これが悪くないと私はがっかりします

BACK INTO ENGLISH

I will be disappointed if this is not bad

INTO JAPANESE

これが悪くなければ私はがっかりするでしょう

BACK INTO ENGLISH

I will be disappointed if this is not bad