to remove the blur you have to go to the game file and change the third line or replace it in notpad
C:\Users\utilisateur\AppData\Local\F1Manager23\Saved\Config\Windows
gameusersettings ini

[ScalabilityGroups]
sg.ResolutionQuality=100
sg.ViewDistanceQuality=3
sg.AntiAliasingQuality=0

and go to the driver to force the AA off if it's still a bit unclear