This is easy advice for me to give when I'm not in your situation, but if your kids are grown and you don't have a compelling reason to stay where you are I would advise you to be open to the possibility of relocating. There are places in this country where good workers are in high demand. Maybe you don't have the ideal skill set for some of these jobs, but your best assets are a good work ethic, flexibility, and a willingness to learn. A wise employer would covet someone with these attributes, regardless of the job in question.
“f your kids are grown and you don’t have a compelling reason to stay where you are I would advise you to be open to the possibility of relocating. “
Very good advice. Pessimism is your enemy. Avoid it as best you can.
I would also think about whether or not your personal beliefs and politics are known where you work and may have played a role. Stranger things have happened. If this is a possibility, you might want to look into legal options, but this is a long and painful road.