Was this found on preflight? How many flights took place since last maintenance action on the bits involved?
I would assume a bit of discussion and review of the maintenance log would answer those questions.
The real question I have is how long the abnormal wear was allowed to exist before being found. One would have to assume a proper daily inspection and preflight by an engineer and pilot would have discovered the wear no more than later than after the last flight one day and before the first flight the next day.
When was the last T/R rigging check done and by whom? What other repair, overhaul, component replacement take place since that time.
The corrosion seen in the photo is also a bit troublesome.
Can an engineer explain how a pilot can cause this kind of wear? Can pedal travel cause this problem if the aircraft is correctly rigged?
Was the tail rotor installed properly....and alignment checked?
I am not sure I accept the premise a pilot caused this.