I have the same and I can't imagine it has anything to do with aim assist.
About 90% for me as well and it's from close to long range.
And it's super fast kills, enemies that seems to be able to react, aim and do headshot in 100 ms.
Just had a game where I had something that I've seen quite a lot in BF2042:
1 on 1 with an enemy in a empty place on the map with no one else but very far away.
I see the enemy first, doing some shots but nothing seems to register.
Having the enemy two meters in front of me I clearly see him aiming down to the ground to his left side—so very far from me.
What happens?
He does a headshot on me instantly the first shot I can hear.
Conclusion must be there's something very f-ed up.
(PS5, 1gb internet, usually about 18–19 ping in BF1 and BF5, although in BF2042 it's weirdly enough around 30–45 most often.)