What's been the hardest part about transitioning from the Military to Civilian employment?

After 20yrs, aircraft mech., ret. 2007, I thought I was all set-up, applying before my ret. date (hoping to double dip)...got my degree in Aeronautics and Six Sigma while I was still in. I had 5 resumes that could be tailored to any position. It's hard to write good resumes after years in the military. Hire someone or ask for help (I hired someone, then plagiarized). I asked my neighbor, who is a very successful business man, worth millions, owning multiple companies in different fields, to take a look at my resumes and give me feedback. He told me to "dumb down" my resume, stating that it was intimidating. Even though I thought my resumes were great (all 5). It was Six-Sigma that got me in the door with Black & Decker, management position. I did not get the job, lack of up-to-date computerize operations management. At the same time, I applied w/ the USMC, I had previously worked with the USMC multiple times. Here's the shocker: I got the job, starting as GS-11 only bcos I had my degree, my degree DID NOT even come close to the job I applied for, they did not care what my degree was in, just that I had one. Had I not had it, I would have started as a GS-9. I'm not saying civil service is for everyone. Transition was VERY hard for me. In the military, I was extremely knowledgeable in my field, assertive (abrasive) and always put my guys first. I was actually perceived as a threat to my new boss and others. It is extremely difficult for me, when you've been groomed to be 150% mission-ready at all times. I struggled with being abrasive, anger issues and civilians pissed me off bcos of laziness. 3yrs later I quit bcos I was still to "motivated" and did not play well with others. My suggestion to those you can relate to my post, take time out for yourself, learn to relax and get help if you need it, it does work. Hope this helped!