I'm editing this because the tone wasn't really what I intended. Sometimes it's too early in the day!
In order to respond to what you said I'd have to write two ore three pages and it still wouldn't matter. Better we should agree to disagree. Now, I certainly wasn't saying you didn't work hard. Building muscle will take some hard work no matter what your methods. But when a guy gets good success based on his beliefs there is not much I can say to convince him otherwise. I just don't extrapolate those results to the general population. So you do what you do and I'll do what I do.
I will say if you keep pushing yourself past a significant plateau without any regards to proper programming then that's a mistake it's not the fault of the routine. Even then it would take years of punishment and abuse to develop "overtraining syndrome" and if someone does that then they just plain needed guidance. Don't blame the system for user error.
Your body only knows stimulus and adaptation. Anything else, imho, no matter what some people might experience IS "airy fairy". But all the info anybody needs is already on this forum so I don't need to play missionary. You've done a good job for yourself and I'm happy for you, btw.