Complex sentence: Allegedly, Clift was unpopular among the Hollywood elite for his refusal to conform to Hollywood standards, since he refused to publicize his private life, avoided movie premieres and parties, was usually unavailable for interviews, and preferred to live outside of Los Angeles.
Split into simpler sentences: Allegedly, Clift was unpopular among the Hollywood elite for his refusal to conform to Hollywood standards. For example, he refused to publicize his private life, avoided movie premieres and parties, was usually unavailable for interviews, and preferred to live outside of Los Angeles.