Oh, Did I mention the Raiders internal bickering with each other, with the coaches. Thats a real mess!! If you don't believe in your leader, or have any doubts in your hearts or minds, than you will not fight for him, thus not play for him. They don't believe in their coach or each other and they will lose because of it.
Well, the lack of talent and old age may also have something to do with it. But this team has no heart and they've proven to NOT BE GOOD ALL YEAR. Its that easy.