Public Leagues - Lack of a willingness to trade?
There is a solution - Don't play public leagues. I've found some GREAT leagues with plenty of active, trade happy managers by browsing through custom leagues. That's really the key, look for the ads commissioners post on these boards for leagues that have been going on for years and take the spot of a manager who has left. Those leagues are always the best because it usually ensures that most managers will stay active and respond to your offers.