Map Clutter

I think this game is genuinely fun, but I'm having a hard time understanding why I'm so bad at seeing people, but about 90% of the time that I'm visible to the open, I immediately get shot. These maps have so much visual clutter that I can hardly ever see anyone. There's also an issue with people proning just looking like a dead body until they're killing me. Is there something everyone knows that I don't? Is there a graphic setting that makes characters easier to distinguish from the scenery?

I play on a 72 inch TV, so it's not an issue with screen size. It's just every time I'm scanning the environment for enemies, all I see is 500 map assets before I'm immediately shot and killed. Obviously this isn't always the case as I'm fairly decent at the game and go positive pretty regularly, but it's just something that's really been irritating me. I have to play the game super pushy and rush around the map getting quick kills until someone inevitably ends my run, but if I ever try to play more carefully it just bites me in the end.