I literally play this game assuming the enemies know where I am all the time now.
It's different when you are in a fight and yes, desync is going to benefit the aggressor, vs the player beelining to you, peeking the corner and 1 tapping you instantly as if he knew all along exactly where your head is.
It cannot be explained by bad servers or netcode. With the sound as bad as it is right now, the level of awareness these players exhibit is just complete nonsense. Having them instantly and perfectly peak and prefire you before you even see them (but it's always 'desync' now, not just people pre aiming or anything) Getting shot through walls by standard accounts, having people sprint up, and start lobbing nades when you haven't moved or made any sound in an eternity. But my deaths these days are just fucking absurd.
I play on east servers which historically don't have the chinese hacker problem. We started just accepting Labs and now Reserve are hacker maps. We went through the chinese RMT hacker phase but now the cheaters seem to just be regular players. It may be the most casual cheating I've seen in the game so far.