The highest ranking you get, the rarer some items are. Assault rifles are harder to find, 8x optics, silencers, and so on. Me and my duo partner are not even that high (top 50k) and we're stuck with table scraps.When we switched to 2-man squad or play with other people in squad mode, suddenly we can find assault rifles easily, tons of ammo, tons of upgrades, healing items, etc.
They do this to balance out the game, this way, the super skilled players don't get easy access to the most powerful weapons and don't wipe out the entire service by themselves.
I get why they use this system, but it's frustrating.
Yeah, that's weird, how do they control this? It must only put players of similar rank in the same maps? I assumed the loot was randomly determined at the start of the match. Is is actually spawned in once you open a door?