there have been many, many stories of steve jobs being a very scary man to work under. Like the story about the workers who got into a lift with Jobs, and were fired by the time it reached their floor.
There was also the story where Jobs was going to be Time man of the year (someone please correct me -- I think it was Time man of the year, but it may have been another publication), but they ended up changing it to someone else because they couldn't find anyone to give a positive interview about him.
Now, these are all stories, and I'm sure many of these myths can be busted, but they must be based on something. The fact that apple is so well liked, and yet Steve Jobs still has the reputation he does says a lot about how arrogant and overbearing he must be.
Of course, his abrasive personality could easily be argued to be why Apple has had so much success. He is blunt and arrogant, but he has needed to be, and a lot of the time it is because he has to fight uphill battles for the right to do things that make us the consumers happy (eg. .99c music; 1.99 TV shows, etc).
I'm about 2/3rds of the way through
iWoz -- highly recommended btw -- it doesn't go into great detail from JObs' perspective, but he is clearly what Apple needs. Woz is shy and soft and good hearted, and Jobs is quite ruthless and a great salesman and not afraid to make enemies for the sake of business.
I don't know the guy, but personally I don't feel he has changed much. However, at the same time, we as Apple fans probably shouldn't want him to .
PS. what did you think of the movie? I was a little disappointed myself.