YOU SAID:
This is significantly worse than I expected
INTO JAPANESE
これは私が予想していたよりもかなり悪いです
BACK INTO ENGLISH
This is much worse than I expected
INTO JAPANESE
これは私が予想していたよりもはるかに悪いです
BACK INTO ENGLISH
This is much worse than I expected
That didn't even make that much sense in English.