Some ideas get transformed into myths, which seems to be happening in the case of Apple Maps. Consumer Reports did a comparison of the Apple application with Google Maps and GPS and said Apple's version wasn't bad and had some nice features. But such a lukewarm review can't stand up against the incessantly repeated statement that Apple screwed up.
By contrast, Apple's Siri was hailed on its release as great. My impression is that continued use of it revealed it wasn't all that good, perhaps much like Maps.