Alot of domestic ducks can't fly simply due to their size and weight. Their wings cannot support them in flight. Angel wing is sometimes caused by genetics, but most often is due to too much protein in their diet. A hatchery definitely would not purposely breed angel wing into their flocks.
No...
That actually doesn't look too bad, I've seen much worse. I worked with a goose once (used to be an Avian Keeper) who had it really bad in one wing, it stuck straight out to the side. We had to clip those feathers often, otherwise he'd rub or whack them on things and start bleeding. Poor guy. So...
Unfortunately, I don't think it's fixable at this point. You can really only successfully treat angel wing before their first flight feathers come in (when the wings are still cartilage and not bone), at least as far as I know and have had experience with. Maybe someone else has experience...