Not my experience. I graduated from three US Navy officer training schools in the early 1980s.
Officer Candidate School, Surface Warfare Officer School and Basic Diving/Salvage Officer school and a variety of different week-two week long schools such as COMSEC, Ships Self Defense Force leader school.....and more.
The instructors at all of these schools were professional. They never demeaned any of us, they never swore at us, they never disrespected us. They DID kick our collective asses, forced PT and LONG runs - like 14 miles at a time.
Using tactics as described above has no place in an educational format. It is ineffective and counter-productive.