Why, indeed. Let's look at how the civilian world was before you joined the USMC. At the time you graduated the unemployment rate was 9.6%. And then it got worse. By the end of the year, it was over 10%. Jobs were not available. Doubly so as the steel mills that had employed generations of Mahoning Valley families were drying up. I ended up relocating to Indiana, where I was lucky to get a Janitorial job. I also made enough of an impression that I worked days on a team that was redesigning the company and nights cleaning the place. But I was lucky to have that. When unemployment hit 10%, I was able to find a job, much less a job that paid higher than minimum wage, to be sure, and a meat packer, back then, had some great benefits. Unfortunately, the bum knees came into play. I had to leave. Good thing I did, too, because the process we set up was so good, the company got Romneyed. While I was learning to walk again, I found out that my disability could get me a free ride to college. I jumped on it. Since my wife wouldn't work outside the home because she never developed a work ethic, I still had to put a roof over our heads and food on the table. I worked on the shipping dock 60 hours a week. I had an understanding boss, so the fact I was slow but steady put me in good stead. No goofing off. When I started college, we worked around that. That's why I only worked 60 hours a week while going to school full time. It wasn't always easy, but I made it through., got my degree, and improved our lot in life. My fave job since graduation was doing tech support. Unfortunately, that company, IMI, also got Romneyed. I'd still be with them, otherwise. My biggest problem, though, since I got downsized, was that I fell in a niche where I was overqualified to do some jobs and under qualified to do others. But, I still had to keep food on the table and a roof over our heads. Something I learned as a boy: take responsibility for everything you do.
As for not imagining what you went through in the USMC, I should mention that one of my mentors growing up also served. He was like a brother to me. He went in during Korea, and before he was 19, he ended up sitting out the war. No, he didn't get discharged, he spent most of his time in a Korean POW camp. He rarely mentioned it, and he wouldn't go into detail. One thing he did say was he often wished he was back in basic (boot camo was his term) where all he had to deal with was his DI.