interview fail

This is how it went....
My interview was at midnight.  So all day Wednesday I sat around nervously reading about teaching, about Korea and looking over questions I heard they ask.  It was a long day, but finally midnight came.  My interviewer was a young sounding North American.  It was nice I could understand him easily.  I thought I was doing ok, and about half way through he wants to talk about my location preferences.  He said I had only listed Busan and Incheon for my preferred locations and asked if I was flexible with my locations.  I said it depends on where I would go.  Any larger city would be ok.  But all the cities are full.  Incheon is full and he can "pretty much guarantee" I would not get Busan.  Ulsan, Daegu, Daejeon, arent options either apparently.  all that's left are the "regular provinces".  If I am placed in a regular province I wouldn't even know where I would be in that province till I arrived in Korea.  He asked if that would be ok, I said if I was placed in a rural area I would be miserable.  I decided I probably shouldn't refuse outright, though I think I made it pretty clear I wasn't interested, so I agreed to talk to my recruiter about the location later.  There's nothing I hate more than living in a rural area.  So after I found out that was my only option I considered the interview over.  My attitude about the whole thing totally changed.  Both my tone of voice and answers.  "I dunno" almost came out a couple times in response to his questions, but I tried to give some answer.  The interview felt like a waste of time after that but I decided I should just try to be professional and finish the interview, even though I didn't care about the outcome.

Found out today from my recruiter that I failed.  There was no way I would have taken the job, and I know I wasn't even trying after the talk about location, but still it feels a little bad to hear that I failed.  What I am wondering is if I was failing before the location talk?  I suppose it would have been better for me to keep doing my best the whole time just to see if I could do well enough to pass.  But after hearing I wouldn't get Busan, or any other location I would want I was so disappointed that I just didn't care.