"everything from the outside REAL world is no longer real to you. How do you make regular friends after going through the psychologically manipulative and hyper-intense experiences with your CEDU peers?"
I think you over estimate the effect of the community there. Sure, it is intense. Most average people would not be able to handle the pressure they put you under there. I may be the exception, but my experience informs me that you can survive leaving that program. Sure, you go through a period of decompression. You may even be different frm when you went in. But you shouldn't be incapable of functioning.
I haven't read enough to know this, but when did you get out? I can assure you, at least from my experience, that you can live a completely normal life. I found my experience in that system made me stronger than people around me.
When a smooth talking USMC recruiter tried to use headgames to recruit me-I was 18 or 19 then and fresh out-I was able to spot everything he did, play along, and avoid his manipulative approaches when it came time to say NO. His first maneuver was to try and convince me that I was breaking a promise I had made. (It was all an issue of symantics-I never promised anything.) His last method was to tell me I would learn so much about myself and my limits. I was happy to tell him that I already knew that stuff. He was impressed. For some reason people tended to beat around the bush with him. (I have no idea why.)
My experiences did not in any way weaken me, but made me stronger. I don't think I was ever in an "Institutional" mindset. I always tried to figure out what they were doing, the motive and the method, and make it to the end. I feel like along the way I dropped some baggage, gained some skills, and mastered myself in a way I wouldn't have otherwise.
I don't think I'm unusual in this regard, but it may be possible that I turned out the way I did in spite of the program. I don't know. I discarded most of that stuff over time and built my own life. Enjoy-Polarbear