Plenty of ISPs do it right (examples: my last 3). That the parent poster's apparently doesn't isn't an argument against the technology their ISP fails to deploy correctly.

Reality is that lots of ISPs do this right. And have for a very long time.

If an ISP chooses to deploy a technology in a bad way, that is not the technology's fault. Even if most ISPs were just giving users a /128 address (which to be clear, is very much not the case), that would not be some kind of failure of IPv6.