If you are stressed out, and feeling like you have some type of mid-life or mental health issue during your tenure at Cisco; it is not you. It is the system.
If you are feeling ongoingly terrible, can't sleep, are irritable to your family, and wondering what is wrong with you; it isn't you. It is this altered state of reality of ongoing LR cycles, and worry.
I was a mess for my last five years at Cisco. My family did not like being around me, I was tired all the time, irritated, and basically just not a nice person. I was never at peace with myself.
I sought counseling and started medication. The medication helped a bit (anxiety medication); but too away my creativity. I was able to do my job, but instead of being irriated, would just tune out the people around me. That included my family.
In the end, I was LR'd. That was the best thing that happened to me. Over the next six months, I had time simply to think and be at peace. I stopped the medication, started exercising a whole bunch, and turned back into the person that I was, mostly, at the start of my career at Cisco.
It is just a toxic place. It is not you. Anyone that does not think it is toxic, is toxic themselves, or a user of others.
If the above describes you, get out, and get yourself back. It is not worth the daily woe.