Worse or more badly?

English as a Second Language English Vocabulary, Grammar and Idioms
1

Hello,
Please look at this exercise :
Put the correct form of the suggested word to the blank:
He wants it (badly) than ever.
I think it is worse but the correct one must be ‘‘more badly’’
Please tell me why.
Thanks in advance.

2

I’d use “worse” or “more”.

3

.
Not a good exercise, duc.
.