Billionaire technopreneur Mark Zuckerberg said the portrayal of him in Academy-award winning movie The Social Network was "hurtful" in his first public Q&A with Facebook users.

"The reality is that writing code, buliding a product and buliding a company actually is not a glamorous enough thing to make a movie about, so there was a lot they had to embellish and make up," he said.

"Because if they were really making a movie, it would have been of me sitting at a computer coding for two hours straight, which would have been not that good a movie."

"They just made up a bunch of stuff that was kind of hurtful," he added, in response to a question about how accurate the movie is.

He said that the film made it seem he built Facebook to meet girls, but he was dating his wife Priscilla Chan even before he started Facebook.

"If somehow I was trying to create Facebook to find women," he said, "that probably wouldn't have gone over well... with my wife, and I wouldn't be married to her today."

The Q&A session, which was posted on Facebook, featured questions from users around the world. Some people came to the Facebook Headquarters in Palo Alto to ask their questions in person. More than 9,000 questions were submitted, and about a dozen were chosen to be answered.

Users did not pull their punches, asking questions like "Why did you force us to install Facebook Messenger?".

"On mobile, each app can focus on doing one thing well... Messaging is one of the few things people do more than social netwoking," Zuckerberg said, adding that they felt that they needed to build a "dedicated, focused experience".

Another asked if Facebook is "losing its charm and becoming boring". Zuckerberg said that people often ask him whether Facebook was getting "less cool", but his goal was never to make Facebook cool, but to make it "work".

"I am not a cool person," he said, to laughter. "You go home, you turn on the lights, you're probably not like 'Yah, electricity, yah!'... It just needs to work."