Conversation so far:
What was Marlon Brando's lifestyle like?
Brando earned a reputation as a 'bad boy' for his public outbursts and antics.
How did Marlon Brando get the reputation as a bad boy?
According to Los Angeles magazine, Brando was rock and roll before anybody knew what rock and roll was.“
What other kind of bad boy behavior did Marlon Brando display besidees being rock and roll?
His behavior during the filming of Mutiny on the Bounty (1962) seemed to bolster his reputation as a difficult star.

Question: Why did they say he was difficult?
Self-contained rewrite: Why did people involved with the filming of Mutiny say Marlon Brando was difficult?