Even if I wasn’t an absurdist at a universal atheistic level, it’d be hard to be a communist without being an absurdist at the societal level Camus is writing at. Trench warfare and line go up and electoralism are absurd things which drive you crazy enough to believe in them if you can’t admit how arbitrary and meaningless they are. When you break from that idealism, Camus has the right confrontational framework for what comes next.
Three things stand out to me:
The disparity between military and civilian certifications. If you’re a mechanic on a specialised machine, it’s easy to become a DOD contractor on that same platform. If you’re an officer, you can say you’ve managed X people. If you’re a medic, your scope of practice is command-by-command. You might work above an LPN level but leave the military with an NREMT EMT-B certification at most which qualifies you for a minimum wage job way below your scope of practice. There are only a handful of slots for advanced schools that give you any worthwhile certification, and the paperwork required to become an LPN ($55k/year~) is very difficult to amass. If you’re a machine gunner, you spent 4+ years mastering a skill that doesn’t transfer to any civilian job and you can only sell yourself as a whipped horse with a broken back.
Military culture itself is traumatic. It’s closer to feudalism than it is anything in the civilian world. There’s a rigid hierarchy and set of standards for every aspect of your life. You have a pathological obsession with being 15 minutes early because your lord can have you arrested if you don’t do everything perfectly. You’re supposed to embrace the toxicity of every part of your day, much less being a cog in the demon machine that hates you as much as it does its victims, and tie your self-worth to that scripted performance. The outlet for dealing with any of that is alcoholism and/or smoking. You can’t afford or make the time for civilian therapy, while military therapists are inquisitors that can have you arrested or end your career.
There’s no blueprint for civilian life. The allure of military life is that you know exactly what every expectation is. You can turn your brain off because you know what to wear and how to wear it, what to do and how to do it, and how doing A will result in B for your career. Your chain of command is a line of narcissistic older siblings and parents strictly directing you down that path. You have that stick incentive of being arrested if you violate any part of the carrot plan. All of a sudden you’re removed from that very traumatic environment and it’s replaced by a much more abstract system where nobody follows the rules you’re conditioned into.
Maybe you make that deal with the devil knowing you’re a good fiddler and you get a golden fiddle for it. If you didn’t explicitly do that for that reason and get the right paperwork for that goal, you leave with nothing and probably hate the field you were trained for but not meaningfully certified in.