While events depicted in the movie are (obviously) dramatized recreations, they all happened. There are loads of evidence, reporting, and video available from contemporaneous reporting.
This movie depicts the man behind the orange curtain. It truly shows the mob-like mentality of using then discarding people who are no longer useful to you. Even the legendary Roy Cohn, who taught Mango Unchained himself outlived his usefulness. The apprentice took everything and more from his mentor.
Cowards admire this nefarious means of getting what they want. Indeed, some cowards are found guilty multiple times because they cannot seem to fathom the word "no"