Complex sentence: In Hollywood, Mauritz Stiller was assigned to direct 1926's "The Temptress" but he could not deal with studio structure and after repeated arguments with MGM executives he was replaced on the film by Fred Niblo and his contract with the studio terminated.
Split into simpler sentences: In Hollywood, Mauritz Stiller was assigned to direct "The Temptress" (1926) for MGM, but he could not deal with studio structure. After repeated arguments with MGM executives, he was replaced on the film by Fred Niblo and his contract with the studio terminated.