sure some of those things are common elements but the way those elements are used is almost indentical in chronology on down to casting ermey. I think kucbrick got a pass because he's KUBRICK because of it were the other way around and FMJ came out in 78 and BOCC came out in 87 people would be HOWLING about how the latter ripped off the former.
as for the goofs after 30 years you start to take in more details than you did when you first saw it.

The video was interesting. Thanks for posting it.
But
I'm not sure about the "ripoff" criticism. The items common to "Full Metal Jacket", "The Boys in Company C" and "Apocalypse Now" are common aspects of military training and combat, so it's not surprising to find them in different films about the same subject.
The goofs shown (British road markings, vehicles driving in circles, continuity errors) are not really noticeable in a normal viewing of the film. At least, I didn't notice them. In that sense, it's arguable whether they really matter.
Regarding the Colonel saluting Joker: As a U.S. Army veteran, I personally observed at least once instance of an officer saluting an enlisted man. It was meant to say, "You're supposed to salute me, dummy!"
Fowler's knots? Did you say fowler's knots?

thanx for watching

Interesting video. Thanks for the link.
Schrodinger's cat walks into a bar and doesn't.