Complex sentence: The film was initially critically successful but not as popular with audiences; his previous production, The Discreet Charm of the Bourgeoisie, had won the Oscar for best foreign film; his next and final film, That Obscure Object of Desire was a more conventional narrative.
Split into simpler sentences: The film was initially critically successful but not as popular with audiences. His previous production, "The Discreet Charm of the Bourgeoisie", had won the Oscar for Best Foreign Language Film, and his next and final film, "That Obscure Object of Desire" was a more conventional narrative.