Brooks Kingsnake strange digestion and behavior? (diarrhea and biting himself)

[Bogertophis]

Totally understand that, having a living critters life in your hands is a big responsibility, If one of my snakes died under my care That would be a crushing blow.

For sure. All we can do is the best we can with whatever information & resources we have to work with. Like all living creatures, sooner or later, snakes get sick & die- but as with ourselves, it's all about the "delay" & having the best life possible in the meantime.