Open C:\Users\Your username\Documents\Battlefield 2042 Open Beta\settings

Edit PROFSAVE_profile with notepad

Press Ctrl+F to search and change these value(Don't type the number in search, one line at a time)

GstRender.AmbientOcclusion 0
GstRender.ConsoleAntiAlias 0
GstRender.EffectsQuality 0
GstRender.MotionBlurEnabled 0
GstRender.PostProcessQuality 0
GstRender.ShadowQuality 0
GstRender.ShaderQuality 0
GstRender.TransparentShadows 0
GstRender.UndergrowthQuality 0
GstRender.WeaponDOF 0

Save, Profit!