You are very correct in regards to suffering over things we cannot control. I know very well about carrying grudges or trying to influence changes in people or organizations or environments where I know that change will be non-existent or minimal at best. I was the one to cause most of my own stress trying to change these things when I should have just accepted and moved on. While intentions may be good, such as trying to resuscitate a person not breathing, you can only try so long and accept no change eventually and move on. Many hugs to you.