It's sad. Volkswagen should've just stuck with having a better in house dev team for it's Volkswagen brand while leaving Audi and Porsche do their own thing.
VW just tried to do too many things at once for too many parties. Obviously there's no "one thing" that they were struggling with, it's a company with 6000 employees trying to juggle several VW brands needs, sometimes against their wish.
They're paying good money tho (Germany money, not silicon valley money)