LOL, that is a terrible analogy. If I bought and built a boxcar and I did it wrong then yes my fault, I'm not building the phone, the manufacturer is, so as a consumer I can expect a certain level of quality.
Most consumers don't know the difference between Google-made Android phones and the others. You're missing the core point which is that the Android platform is fragmented and regular people are being given a phone full of advertising and apps built for up selling.