Oliver Stone is a protagonist and a propagandist of the first order, coming from the most radical and extremist form of leftwing politics. His movies basically crap all over the American landscape and for good reason. He's an angry and cynical man.
This is not to say that the production values of his films aren't of the highest quality along with some good acting. That goes for Platoon. As with most contemporary directors, Stone is a liberal who offers movies with a message. Since most of his films are set in recent times, any deviation from actual current events and history itself, opens him up to severe criticism. And rightly so.
I watch movies mainly for entertainment. Life bombards us all with enough messages. Even "Wall Street" has worn thin since its original release. Stone's movies don't hold up well over time. Apocalypse Now-Redux is the definitive Vietnam War movie. Along with Full Metal Jacket. Two films that stand up well against the test of time, from two directors known for entertaining folks.
Rant over.
I found “Apocalypse Now” to be a bloated mess, and “Full Metal Jacket” ridiculous. There was an authenticity to “Platoon” that may well have been due to Stone’s combat service in Vietnam, which - needless to say - neither Coppola nor Kubrick shared.