Here's a few of the settings I use, alongside my peripherals, launch options and keybinds you may find useful.

Peripherals

Mouse: Glorius Model 0 (Modded to wireless)
Mousepad: Corsair NoSlip
Keyboard: Newskill Spryro Pro
Headphones: Astro Gaming A50
Mic: Wave XLR
Monitor 1: Asus Tuf Gaming VG259QM GSync 280hz
Monitor 2: Zowie BenQ XL2456K 240hz

Experimental

DPI: 700
Sensitivity: 0.555 (non ads)
FOV: 90
Resolution: 1920x1080
UI Scale: 0.85
ADS Sens: 1

Launch Options
-gc.buffer 4096 -client.headlerp_inertia FALSE -cpu_priority high

What do these launch options do?

GC buffer: reduces stutters.
Client.Headlerp: When you let go of alt whilst alt looking, it snaps back into the centre, instead of the slow gradual return to centre.
CPU Priority: Makes the game run in high priority, generally resulting in more fps.
PC Specs
Motherboard: X670 AORUS ELITE AX
CPU: AMD 5800X3D
CPU COOLER: Corsair h100i Elite Capellix
GPU: NVIDIA RTX 3070Ti
RAM: G.Skill Ripjaws S5 64GB (2x 32GB) DDR5 6000MHz CL30 Memory
Storage: AORUS Gen4 SSD 2TB (x2)