I've known a number of people (maybe double digits by now?) from my navy days who went to Delta or Fedex or wherever, and quit after a year or two because they hated it. Left the airlines and professional flying entirely. I don't think it was the crewed cockpit thing/working with others for them. Mostly just hating year 1, maybe realizing the career involved more being gone and flying • schedules, and less getting $40k 2-day green slips every trip. We still have the crew in perhaps a slightly less formalized and scripted sense, whether that be multi-seated tactical aircraft (prowler, growler, tomcat, F/A-18F) or just the crew concept within a multi-aircraft flight with your wingmen. There might be someone every once in a while who can't adjust to that, or maybe slightly more commonly, the retired senior mil person who can't accept being the FNG again and being the #2 in the flight deck. I still imagine that's a smaller %, but you guys would know better than me since I don't fly with them in my seat. I know there is or was a pretty notorious retired O-6 Hornet guy at my shop, who according to legend, very much fit this personality. Maybe retired, I've never flown with him. But I know they are out there, probably at any place. I also know a non-zero amount of military pilots who have absolutely no interest in commercial flying or aircraft, and it was always pretty much just "fly fighters" or nothing for them. Maybe this is the realization that some people come to once they've done it, that they weren't consciously aware of beforehand? I dunno, for me I just like flying, doesn't matter if its mil aircraft or a people bus or whatever else.
