I haven’t seen that movie but if you’re interested in the subject I highly recommend two books. 1. JFK and the Unspeakable: Why He Died and Why It Matters by James Douglass. This one is the one RFK Jr also recommends.
2. The Secret Team: The CIA and its Allies in Control of the United States and the World by Col. Fletcher Prouty. This one is out in two versions, mine is from the original printing in, I think, 1973. The gov’t acted a little slow but did manage to buy them out after it started making a hit. They then allowed a reprint after some editing. I haven’t seen one of those but imagine it would still give the jist of the story, that being how the CIA expands, imbeds, and finances itself into everything. Prouty was a sort of role model for the part Donald Sutherland played in Stone’s first JFK movie.
After these two eye opening books you should be able to recognize that something is wrong and it’s not gridlock, that something needs to be done and it’s not term limits, there’s a reason voting for different people doesn’t change anything. They are the “temps.”