You may find this useful as a reference in the future -> http://en.wikipedia.org/wiki/Hyperbole
Let me summarize your position, you think that because some people will buy Android phones loaded with carrier restrictions and software that doesn't work how they expect, that they will blame the Android platform as a whole. Further, your position appears to be that there will be a significant number of these people that it will cause a significant decline in Android adoption numbers.
My refutation is that if a few manufacturer/carrier combinations produce Android phones that don't live up to their Android name, consumers are not forced to buy those phones. Once enough people give a particular phone a bad name no one will buy that particular phone and they will go to other phones. There are lots of high quality Android phones that meet the needs of users today. Take a look at the Droid, Nexus One, or HTC EVO for some great examples. This idea that bad press for one particular phone will turn people off the whole Android platform is rubbish. There is no evidence for that and no precedent for it. Consumers don't care about platforms they care about phones. There are many different manufacturers producing many different phones for Android, which gives the consumer a lot of choice to find the phone that suits them. That's the power of Android being open. Will there be bad Android phones produced? Inevitably, but the market place will marginalize those products into irrelevance.
Finally, I'd like to add that your Toyota example is particularly malformed. First, Toyota is a manufacturer of cars. The correct parallel to the cell phone world would be a Motorola, HTC, Samsung, etc. If Motorola puts out a bad phone then it won't sell well, just as if Toyota produces a bad car it won't sell well. Secondly, the reason Toyota's sales numbers dropped was because of safety concerns, not a bad user experience. You can't compare a runaway Prius to "my Android phone looks different/I can't get XYZ app."