@John-And-Teail0 Yes, unfortunately Airbnb's review policy is that guests are prompted to review if they cancel day-of check-in. Even if they never even arrived and canceled before check-in! It's insane, we all agree.
Just use the opportunity to write an honest review for this guest, to warn other hosts. No one wants a guest like this. The guest will no doubt leave you an awful review, but just in case he doesn't get around to reviewing, wait until the 13 and a half day to submit yours- that way he may get the notification that you've left a review too late to leave one himself.
And hopefully he will say something in the review that will be against Airbnb review policy so you may be able to get Airbnb to remove it. Supposedly you can ask for a review that's irrelevant to be removed now, so if he complains abut the off-grid nature of the listing, which you say is clearly that in your description, that may be grounds for removal.
This guest, although new to Airbnb, sounds like he has been reading online blogs about how to get free stay or a full refund on Airbnb. Jerk.