All this talk of rest.
To me the true source of the issues were the large quantity of your resources and the scaling of the usages of them.
D&D more or less gives you a sack of bullets and tells you to manage them.
Because of realism, you don't start with a small bag and pick up bullets every so often. No ammo pickups assumed.
And because of tropes, the few "restore your resources" items are NEVER EVER EVER crafted by ANYONE in the environment.
1) D&D should assume that the worlds contain basic common magic items.
2) Skilled craftspersons and intelligent monsters should be able to craft healing potions, mana potions, stamina potions, power pearls, chaos powder, and whatever else restores their strength.