Always running out of ammo

Not seeing it. More than enough loot available. Carrying capacity is mildly limited but you have to make choices on what's important to you...do you really need 100 shotgun rounds or can you lose a few to make room for a health pack.

Problem I see is most think they must engage every enemy they see, no matter how bad of a choice it is. So yeah if you run across the map like it's a CoD game, trying to rambo everyone then yes ammo/loot may be an issue. 

Play smart, loot what you can and remember the main basis is to survive, not get 15 kills a match.