If it helps, I graduated in a prior severe recession, and there is life at the end of the tunnel.
Different people work through these frustrations and desperations differently, but it might well be good to keep in touch with others from your class, or meet new graduates facing the same troubles. One aspect of this that might cause even greater harm is that we don't often want to admit just how difficult this is--and how badly affected we are.
On the positive side, for all I encourage you to search out unusual opportunties, whether in smaller firms, out-of-the-way agencies, or in administrative work that is close to your desires and for which you might get some mileage out of your legal credential.
I'll recommend a few books that can help, both in practical terms and in getting back into a positive frame of reference. The first is likely to cause a reaction, but the reason I'm including it is that the skills needed to land a job at the top are very much the same skills to land a job anywhere else, inside the law or elsewhere. This is The Insider's Guide to Getting a Big Firm Job. There are strategies for scrounging interviews quite apart from the unreal world of OCI. And there are key skills to doing well in the actual interview.
Once you've landed a job--even if it's temporary, contract, appointment, or unpaid--this is the time to shine. This is where raw caring and dedication can make up for pedigree and economics. Read Jagged Rocks of Wisdom--The Memo. You'll be miles ahead. This is from Morten Lund, author of the first book in that series...creatively enough, just Jagged Rocks of Wisdom.
I hope these bring back some of that mojo, and to all, best of luck,