Head to graphics turn down Vignete / Blurr and all other options in that section.

Now go lower and put the Graphics customisation to Verry Low or manually turn down each section.

Under
C:\Users\40745\Documents\Battlefield 2042\settings

save "PROFSAVE_profile[drive.google.com]" to folder location ( but after editing resolutions )

Next

Make a Config.cfg file ( same as you do in Counter-Strike games )

And paste this inside

Thread.MaxProcessorCount X
Thread.ProcessorCount X
Thread.MinFreeProcessorCount 0
Thread.JobThreadPriority 0


X ( the maximum number of THREADS your CPU has )

This is a much faster Tutorial on how to get more fps on these type of hardware

Especially GPU bottleneck