using the attendance helper on the USA offsite, it looks like your prices are a tad high for D2, even if you were in the middle of the pack for attracting fans. And as you relegated, your attendance is obviously lower than average. But I would assume that the relegation penalty only lasts the first half or 2/3 of the season (similar to the promotion bonus on attendance).
Any way you slice it, those folks who have demoted from NBBA have had to take pretty strong measures to cut salary. Rambo and namssor being obvious examples.
And I'm sure it sucks a big rocket, but I personally agree with the aim of teh promotion and relegation effects on attendance. Overall they are there to help promoting teams have a fighting chance to stay in their new league; on the other side, the relegation penalty helps prevent the situation where the relegatee is inevitably promoted right back after just one season. I've played in manager games where there isn't such a thing, and to me that really feels like a waste of time and unenjoyable.