I have a buddy that flies - he was a flight instructor when he was pretty young. He recounted the time he was with a big Iowa football player at the controls. The kid froze up and wouldn’t take his hands off the controls - my friend tried removing them but the kid was just frozen in fear (they were diving towards the ground). My friend punched him in the face and freed the controls just in the nick of time.
“I landed the plane walked to the office and quit my job - I wasn’t getting paid enough for that crap.” (I think his next job was as a crop duster!)
That’s how I felt / quit after substitute teaching in the Inner City.
And this advice I am about to give is for current CFI's that might experience this.
If you see a student with excessive hours and no Solo, going through multiple Flight Instructors, say good bye!
A fellow Instructor took on a student with almost 100 hours and no solo.
The student froze on a bad landing and was heading off the runway. The instructor fought for the controls and just could not get him off. The airplane, a Cessna 172 veered off the runway and on a downhill slope heading across a taxiway to a Hangar. Impacted the Hangar at a fast taxi speed, destroyed the Airplane and damaged the Hangar Door. Pilot and Instructor, no injury.
Then the CFI had to explain to the FAA and become recertified basically and take a check ride.
My advice gage the student, and if they are acting odd or doing crazy things or have a long record of changing instructors. SAY GOODBYE!
Don't let them do landings or touch and goes if they are messing up at Altitude.
End of Lecture! LOL!