Well, if you were to speak to the drivers who raced for him (the few that are still alive), you might find a different perspective. I haven't seen the movie yet, so I can't say how he was portrayed but, according to many, he was a very complex individual who demanded 110% and refrained from befriending his drivers because so many were killed driving his cars.
(Read Robert Daley's "The Cruel Sport" or Michael Cannell's "The Limit...Life and Death on the 1961 Grand Prix Circuit".