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Has this game ever worked properly on this computer?Or never yet?

Right click on victoria3.exe , properties, compatibility. Tick "disable fullScreen optimisations" untick every other box in that dialog, Apply and exit.
Then in the launcher Game Settings menu, select fullScreen display mode, Vsync off, cap refresh rate at 60.


If those don't help:
DXDIAG is a program you run from the Windows search box on the task bar. After running it will open a window and start collecting info with a progress bar in the lower-left corner. When it completes click the 'save all information' button and save it to a file then attach that file here.

Please attach here your Documents/Paradox Interactive/Victoria3/pdx_settings.json .
From your Documents/Paradox Interactive/Victoria3/logs/ folder, attach here system.log , error.log , exceptions.txt
 
Intel(R) Core(TM) i9-14900
You very likely have the CPU/bios hardware issue discussed here:

FIRST please check for an updated bios. Then please implement the “Intel Default” option in it, if present.

If that's not there or doesn't help, please go through the above post in detail.

Hopefully those steps will help you as they have others. Good luck!