Windows phones had a very enthusiastic but too-tiny following. Blackberry lost the plot with terrible hardware and software for the app era (developing an app for the Storm was enough to convince me to never get one of their phones). Symbian's S60 was too little too late in the US. Ubuntu, Mozilla, and others all tried various flavors of Linux and web based phones to no success.
I don't think you can really blame Google or Apple for any of these failures in the same way Microsoft could be blamed in the 90's for their abuses.
With that said, I wouldn't be surprised if, eventually, Google was forced to change how they handle third party app stores. iPhones will likely never be big enough for Apple to be forced to allow other stores in the US.