Guys I need tips to git gud.

In Delta Force or Quake-like games, I have decent aim. Unless I'm in a bad day, I can get my shit together and in my best days get top 5.

In BF6, it feels I can only get decent things done if I'm playing very slow and campish. I can't play fast like some guy I see running and gunning.
Also, I've lost any sense on how to aim in that game since Beta day 1. I'm missing shotgun hits at like 2m from the enemy. I'm used to high FoVs (120) but in BF I'm not seeing anything if I go that high, I'm getting shot by invisible dots in the distance.
Also I'm losing so many hipfire battles when I engage first, it makes no sense.

Any tips?