My son, a REME corporal, tore his crucial tendon on an NCO course some nine years ago.
Since then he has been the victim of truly dreadful medical care, including a botched op which only partially repaired the problem. Finally this year he had a proper full knee repair operation - the civilian surgeon was appalled at the state of his knee and that it had been left so long before being treated properly.
In the interim, army Pee Tee Eyes have been riding him, telling him to get some PE in, running etc, all stuff calculated to totally bugger up an already damaged knee. It is now highly unlikely he will ever recover full use of his knee. Needless to say he has been bypassed for promotion because of his medical unfitness. He also has a general impression that his superiors assume he has been malingering - no doubt the Pee Tee Eyes all think that.
Result - a hard working, resourceful and loyal NCO has become disillusioned with the army and is now just hoping he can survive the last 3 years till his pension. What a waste of manpower.