Wouldn’t it make more sense if MC Concern was the Story Goal instead of OS Concern since MC is the reader’s position in the story-- the perspective being reconsidered? MC is considering whether to give up on life or try to build one back up.
Remember, all four throughlines can have a goal of their own, and it is up to the author which goal he chooses to emphasize. But it’s also worth noting that if your MC is also the protagonist, then the OS Goals and MC goals might be overlapped: