>> It's unfit for the purpose
> There is nowhere in the US that has that concept.
Sure there is, embodied as UCC 2-314 [https://www.law.cornell.edu/ucc/2/2-314]: courts may imply a Warranty of merchantability when (1) the seller is the merchant of such goods, and (2) the buyer uses the goods for the ordinary purposes for which such goods are sold. Thus, a buyer can sue a seller for breaching the implied warranty by selling goods unfit for their ordinary purpose.
There is also UCC 2-315, fitness for particular purpose [https://www.law.cornell.edu/ucc/2/2-315]:
> Where the seller at the time of contracting has reason to know any particular purpose for which the goods are required and that the buyer is relying on the seller's skill or judgment to select or furnish suitable goods, there is unless excluded or modified under the next section an implied warranty that the goods shall be fit for such purpose.
By being part of the Uniform Commercial Code, it is a nearly universally accepted law across the United States.
The UCC is mostly a codification of a much longer standing bit of law with similar aims and construct, the implied warranty of fitness for purpose, that iirc as part of the common law predates the sovereignty of the United States.