A device is bricked if it no longer performs any of its functions other than those a brick can perform. That is, if it does nothing useful, it has been bricked. This is a failure on the device itself — the device relies on a service that no longer exists. That this failure was designed into the device doesn’t mean it’s not a failure.
Refunding money is just one of Google’s options. If it’s laughable, then they should consider other options. For example, they could release an update that permits the device to function without checking for permission.
At least in my State, California, they didn’t exceed their guaranteed life expectancy in the warranty. California adds terms to durable goods warranties, including that the company must make available sufficient information and parts to permits the device to be repaired and to continue to function for seven years.
I’m curious if you would feel the same way if this was a car.