The thing is that it doesn't break down except in the extreme cases, and even then it's often less bad than the edge cases with traditional human-mediated customer service. Consider the Wells Fargo accounts snafu, or the Comcast customer nickname issue. Or PayPal just in general. Is Google actually worse, or are they the kind of better that makes their rarer screwups seem worse. Consider in your evaluation just how many people they deal with using their automated systems.