Have you had disasters turn into blessings?

I think, in part, 'disaster' is kind of relative to your situation. You're pointed in the right direction when you say a bad situation appears hopeless. Some things that happen in our teens or early twenties seem life stopping terrible, yet with age and reflection were not the issue we made it out to be.
That said, some life changing disasters leave a mark. Divorces, deaths, accidents, job loss, arrests and the list goes on will alter the trajectory of your life catastrophically if you let it. Life sometimes has bad things happen. Knowing how to tackle the issue and come up with a solution is part of the struggle.

A key that I have found works for me is to always find one positive thing each day I can sleep on & call it a positive day. There may be a whole bunch of crap in that day, but I need to find one positive and hang my hat. No two days are alike so tomorrow will be something different.

This may not have been the answer you were searching for but I agree with your premise - you can recover and the majority of the time things are not hopeless.