Complex sentence: In terms of Miller's film career, his 2008 adaptation of "The Spirit" received negative reviews, earning a metascore of 30/100 at Metacritic.com, while his film adaptation of Sin City was well-received by audiences and critics.
Split into simpler sentences: In terms of Miller's film career, his 2008 adaptation of "The Spirit" received negative reviews, earning a metascore of 30/100 at Metacritic.com. Meanwhile, his film adaptation of Sin City was well-received by audiences and critics.