While it does sound like an issue with the account, the unusual part is that Chromebook hands over the control of a device you own to someone else, just because you logged in to some account. Call me old fashioned, but an OS or device that does this is a vulgar anti-consumer design.
I get it that consumers should accept it as a feature of the product. But this was an unacceptable proposition a decade ago. There is a gradual erosion of consumer rights and we aren't fighting back enough. Another factor is that even tech savvy users are caught by surprise. This means that this drawback is not sufficiently highlighted in the product description. The platform may not have become this popular if it was.