Feed the BEAST - over and over and over and.......
Wife and I decided already we're just going to wear our UNDISPUTED black Tee's and black Buckeye jacket (w/ scarlet sleeves).
Mike, Late getting here so maybe this is too late but I know where you are, been there done that too. Almost as old too. One comment above suggested to take the severance and double dip. Check that out carefully as many packages come with strings that reduce beni's if you take other employment. Most are connected thru the state unemployment bureau to monitor such 'abuses'.
You're not wrong to feel this way. It's natural, some might say organic. It's also good from the stand point that it wakes us up to the reality of where we are in life. I won't B.S. you, sixty is a tough age to start again from. It was hard enough at 54 back during the '09 housing/job market collapse. But with good friends (11W folks included) and family and all the contacts you've made over the years I'll bet you'll find your network is stronger than you think.
Start writing or polishing up the resume. Don't forget the additional training you may have gotten, various duties you did over the years that give you more experience than others. Things that let them know you can hit the ground running. IF there's room add any civic or volunteer work etc. Stay away from dates that might infer age and anything having to do with religion or those so called hot button issues. I know it's obvious but you wouldn't believe the ones I've seen that have too much info on them.
Lastly, and not to begin to tell you what to do financially but if the severance includes your insurance without a COBRA then that sounds like the best deal. A clean break from them. A 'lesser' job would just build on that lingering anger. Who needs it.
Not sure where you live but if I can help send me a private message. Good luck sir.