Originally posted by Pobblebonk:

When using 2 stamina foods I don't mind losing most of my health from a single failed parry because then it is my fault, but I do mind losing almost all of my health despite doing a perfect parry with the best buckler in the game and a decent blocking skill just because I ate different food. As I said in the initial post, it makes no sense that staggering depends on health only.

The choice of food and equipment you use in a battle is also your own. Most engagements are decided well before their commencing, and that's no flaw, it's integral part of the survival genre.