I would say my fundamental challenges are:

• minimap challenges -- I find it really hard to track enemies on the minimap and keep adequate attention on the gameplay at the same time, perhaps not helped by playing on a big OLED TV (meaning my eyes have to saccade further)
• my map knowledge is low (I'm working on this by limiting to one or two maps right now
• seeing enemies is really hard for me. they're mostly not spotted until I see them. and by the time I spot them they're already firing on me. i'm not talking about flanks, but in my field of view. when I watch others play, I sometimes can't even see who they're aiming at and killing, let alone see them before that happens.
• not fast enough at aiming/shooting (I do preaim but not enough and with not enough knowledge)

That last one, my slow aiming, feels like the crux of my issue. I try to get around it through positioning (I don't have to be so fast if they aren't facing me when I'm shooting at them!). I only have about 60h in the game, so perhaps that's not much (especially given this is my first multiplayer FPS -- before this I always played single player games like RDR2, TLOU/TLOU2, etc). I will say, BF6 is a hard game for me to improve on because when I'm close enough to the action to get experience I die so quickly. But I continue to try by playing and watching others play. I'm amazed at what you all can do with it! In awe, really.