Drama and backbiting can wreck an entire season, even with the best players in the country. I hope it isn't beginning already.
A team can still win with a crap coach- case in point, the 2004 Olympic Women's Soccer team- April Heinrichs was the worst coach in USWNT history, and the likes of Mia Hamm, Brandi Chastain, Joy Fawcett, Kristine Lilly and Julie Foudy still won Olympic Gold.
Edited to add- the only person that I am saying is a crap coach with this post is April Heinrichs.