I'm really sorry that this happened to you, and that you feel so bad as a result.

This may not help you at all, but I've been fired 3 times in thirty years of working. Each time, I was really ill-suited for the job and I was planning or contemplating leaving it. Each time, I found something better. I firmly believe that getting fired really meant that I was supposed to be going down a different path. And I did. For of those jobs, if I hadn't been fired I never would have met my wife.

You know that whole window shut, door open truism? It does really work. There may be all kinds of opportunities ahead because you've disconnected from this job that may have been holding you back.