I think there might be an issue with AMD CPUs
I checked out Cohh streaming the game, and it looks super smooth on his 3080 rig running at "Psycho" settings at 1440p.
Then I see this, updated benchmarks from toms hardware, using another Intel rig
He's testing right outside the apartment, just like I did. Using the exact same settings, he's getting 57-67 FPS, while I get 30-40.
Will have to look into this more