I have no idea if any of the planes I flew were crashed. I do know that of the 3 instructors I had, one didn't make it past her first job past instructing. She went in due to vertigo in IFR conditions with a light twin AC.
I had 3 instructors as the first got a job as a forest fire fighter dropping retardant. I suppose it might be safer than a basic flight instructor job. The second took the first commercial job she could get (she WAS a good instructor IMO) and I think it was flying light freight like checks. I wasn't given the whole story, just told she passed when I came in to rent one of the school traumahawks for more hours.
I have no idea about the third guy. I didn't care much for him at all.
Due to the changing of instructors I ended up using more hours to get my license because two of them needed me to show proficiency before continuing the process. As a result I got the license in 44 hours vs 40 that I was aiming for.