Complex sentence: The Texans failed to improve upon their 12--4 record from 2012, suffering through a season-ending 14-game losing streak following a 2--0 start and missing the playoffs for the first time since 2010.
Split into simpler sentences: The Texans failed to improve upon their 12--4 record from 2012. They suffered through a season-ending 14-game losing streak following a 2--0 start and missed the playoffs for the first time since 2010.