It was a MARK crowd, filled with fans who are smart about wrestling. Of course Ryback isn't going to get a massive babyface pop when he's facing fans who grew up loving Goldberg. The same fans hate Sheamus cause of how generic of a character he's become and hate Cena for the same damn reasons. Then those same fans will cheer CM PUNK all night long, despite him calling them idiots.
That's the type of crowds WWE is going to have to deal with nowadays. Why fight it? Work with it! Ryback gets Goldberg chants? Have him do more badass stuff so fans can buy into him more.