I hate that the Linux community is so quick to fall into blame mode.

That user has an issue using Linux. It's an issue that's not uncommon and it does stop that user from using Linux.

As an user, does it matter who's at fault that his Linux install isn't working as expected?

Say you buy a brand new Fiat, and 5 kilometers out of the dealership the transmission just dies.

Are you going to say "Using this car sucks" or are you going to say "The subcontractor that made the clutch mechanism in that transmission sucks"?

If your car dies, you are not getting to work today. This sucks. You don't care who is at fault, using an unreliable car sucks.

To get back to Linux: If some beginner goes through the trouble and fails, it's very little help to call them out for being a beginner or to aim the blame.

OOP's assessment is correct: Linux is nice, but there are pitfals for people who aren't versed in all the things that can go when using Linux. And yes, this one was caused by Windows, but that really doesn't help a novice user who's Linux won't boot anymore.