Complex sentence: The Bellas come in third in the competition behind the Treblemakers and the Footnotes; even though the audience seemed to enjoy Beca's remix, Aubrey becomes furious and yells at Beca, who in turn quits the Bellas.
Split into simpler sentences: The Bellas come in third in the competition behind the Treblemakers and the Footnotes. Even though the audience seemed to enjoy Beca's remix, Aubrey becomes furious with Beca, who in turn quits the Bellas.