We are in a delicate situation here:

Many people want to get out of BTCJam, but the problem is that we have money in there, that will not be returned until the borrowers do pay.
But if the borrowers don't have confidence in the site, they will not pay.

So we are in a situation in which many investors are holding their words out just because they want to get paid, and only criticizing internally in groups like BIG of Facebook.

If you want to get out of their system, the best way right now is not to invest in any more loans there and slowly get your money out as payments come. Then, choose a better platform (BLC seems to be working great for now, and the admins are much more open).