hopeless

Certain to fail.

“the situation is hopeless”

(informal to emphasize how bad it is) beyond hope of management or reform.

“she handed me a hopeless jumble of papers”

“he is a hopeless romantic”

Of a person unable to do something skillfully.

“I'm hopeless at mathematics”

Without hope because there seems to be no possibility of comfort or success.

“in an agony of hopeless grief”

“with a hopeless sigh he sat down”