I've been around Army CBT MOS DI's during the 60's that would have made Ermey seem like a loud mouth choir boy. It's the quiet ones you have to worry about. I have friends from the same time period that thought their Basic and AIT,,, at other training sites,,,, was like a long vacation. Mos, location, and how long your DI's were back from Vietnam, and where they were stationed, had a lot to do with your experience. Today basic is like school. The tactics used during the Vietnam era are no longer tolerated.
R lee created himself by manipulating TV. Personally I think his Gunny dog and pony show went way over the top. In the UK he's known as "Hollywood's greatest drill sergeant". Thankfully this is The USA where having opinions, are encouraged.