I feel for you man, you're a DPE so regardless you get stuck between the rock and a hard place.
BUT know that places where it's a nightmare exist. I got my CFI a decade ago at the Dupage FSDO (outside Chicago) and it was a nightmare from the start. I get signed off and my instructor and I walk down to the office (it was on the field at DPA) and the first thing they say is after I tell them I like to schedule a CFI initial ride is: "the last 10 students this year alone failed, good luck!" (it was Jan 5th) my instructor was F***** pissed. Fast forward 2 months, 40+ calls to reschedule all due to weather or their conflicts ( apparently the DPE was also a corporate pilot that had "scheduling conflicts"), so I had to get signed off again because they wouldn't return my calls.
Finally I get to take the exam 73 days after being initially signed off and 7 hours in (i could be miss-remembering, it could have been longer), I get the pink slip. I remember the question to this day: " In one sentence, describe turns around a point". Now I had things I had answered incorrectly previously but apparently not fail worthy. When my instructor asked what went wrong, they said he did very well just missed a question. WTF
Eventually did the rest of the oral, it lasted 8 minutes, and then the flight, which was 2.7 hours. I got the cert but all in all it cost my about $1000 extra... I talk with other friends who did theirs through ATP and the WHOLE thing took 2 hours. Needless to say I was turned off from the whole process.
Granted this most likely is a RARE encounter, but just saying it happens.