This subject crops up every once in a while, and u/restricteddata answered that a while ago here:

https://amp.reddit.com/r/AskHistorians/comments/5fg3z2/how_accurate_is_oliver_stones_untold_history_of/

Someone else could probably add more about it though. From reading the answer I linked, it just seems like the narrative is mostly outdated, but not false.

Edit: it's probably considerably more accurate than his other films, ESPECIALLY JFK.