Sure, but intel is ultimately left holding the bag here not the oem, and it was totally within their power to put stipulations in the contract around key management.

Margins are not great in the x86 PC hardware business. Has there ever been a lawsuit between Intel and an OEM?

Contracts don't work. IMO Intel should not provide raw keys to the OEMs but HSMs with the keys preloaded. And MS should require good key management for the Secured Core sticker (although probably few/no MSI products are Secured Core anyway).