The restaurant's excellent service is not enough to 'redeem' [='compensate for'] the mediocre food.
The President 'redeemed' his campaign promise. [=he did what he promised to do]
The exciting ending partially 'redeems' what is otherwise a very dull movie.
(..) I really must protest. Carefully, Lieutenant. Pirate or not, this man saved my life. One good deed is not enough to redeem a man of a lifetime of wickedness. Though it seems enough to condemn him. Indeed. Finally. (..)2003 Pirates of the Caribbean: The Curse of the Black Pearl