No idea why the real Don King got mad at this, shows him in great light!

Think about it for a moment, the movie:
- Never accuses DK of anything it's not already public or widely believed already
- Gives DK ample time, several times, to explain his reasons and motivation:
a) his father's death
b) his craving for credit from his peers (Ali, Herbert), whom almost all looked down on him no matter what (except Price, whom is also given his chance to expose his grievances and is pretty much the only one spared by DK's rebuttals to the camera).
c) his upbringing which obviously taught him the only way for a poor person to climb was over others and cutting corners
- Gives DK the chance to rebut every/all charges in no better way than the real DK would defend himself
a) The stomping incident (only did it because it became public he was owed money)
b) The break-up with Price (short fuse upon being insulted/reminded of his past)
c) His "negrociation" tactics (coming up in a racist America where blacks were treated like scum, what did you expect?)
d) How everyone (including HBO itself) is part of the same game/hypocrisy, even Ali (as he stated, still goes to DKP fights, at 10 grand a pop)
e) How Tyson was simply a time bomb waiting to go off regardless of whom handled him.
f) How his fighters, as cheated out of money as they were by him, STILL took home more than what they would with Bob Arum.

I mean, the film pretty much celebrates King, does not condemn him.