Current PvE balancing seems too difficult for a number of reasons;
Food and Water deteriorates very quickly
There are too many items
Too few items spawn
Starting inventory is very limited
The chance to bleed when being hit is very high
There is no health indicator (at least that I've noticed)
The text prompts (aside from then they're red and you're losing health, are too vague
Individually none of these are large issues, but put together they make the game experience unenjoyable. Zombies should be dangerous, but getting hit once shouldn't mean you'll almost certainly bleed out. If food and water are rare, they should refill you to full, and shouldn't deteriorate so quickly. If we're suppose to pick up everything we find to create other things, inventory shouldn't be as limited and/or backpacks should be easier to find.