Absolute adjectives describe qualities that can't be measured in degrees. For example, you can't be "more pregnant" or "less dead," and similarly, you can't be "more hopeless" or "less hopeless."
Instead of using comparative or superlative forms, we might use other words or phrases to describe different levels of hopelessness:
* More despairing
* More despondent
* More disheartened
* Extremely hopeless
* Utterly hopeless
The best way to express varying degrees of hopelessness will depend on the specific context.