Steven- I respectfully disagree. I see people as highly proficient of dismantling themselves from excessive volume and intensity.
Brother, you have had multiple forays into this OR/OT land and the effects are not just cumulative but similar to heat exhaustion, they come back hard and fast without planned avoidance. It can literally take MONTHS to get one;s shit squared away and that is to just get healthy, it does not then open the door to more 100% training! Just because you feel better it's not a sign you are back to "normal".
"Survival will be neither to the strongest of the species, nor to the most intelligent, but to those most adaptable to change."