Complex sentence: Bundesliga, only a skeleton of the successful 2001 team remained; the season 2002--03 ended up in chaos, with the team fighting relegation (ultimately in vain) from the very beginning, various coaches departing and other problems internal to the club.
Split into simpler sentences: Bundesliga, only a skeleton of the successful 2001 team remained. The 2002--03 season ended up in chaos, with the team fighting relegation (ultimately in vain) from the very beginning, various coaches departing and other problems internal to the club.