"Don't put off today till tomorrow" as in, 'Yesterday has no future'. As much as the bitterness, chokes one going through undesired change, dwelling on the past won't ease today's worries.
Like you mentioned, many have gone down this road, and while it is a well traveled route, the surroundings are not well mapped. Whether it was a forced trip due to restructuring, economic survival, financial necessity, or blatant greed...much like aging, there is not much we can do about reversing the trip.
I don't believe there is any option other than to shake it off, roll up the sleeves and tackle life head-on. My job search ate away at me for quite sometime, and though I'm still in the hunt, the callouses have built up enough that I no longer fear losing grip. Granted, if it weren't for the support of my wife, both emotionally & financially I might not have such a carefree attitude. But I also have faith that things happen for a reason, and though 'why' may remain hidden, fretting over what should of, could of...doesn't offer anything but UN-needed stress & agony.
IMO - Life is a one-way road, turn up the radio, put the top down, and enjoy the ride!
PS: I know this not what you were looking for, but sometimes, I just need to spit it out to reaffirm that I'm gonna make it alright in the long run... & you will too!!!