Hello, @Pucekcould you please create a new post with the link below.
https://community.sigames.com/bugtracker/football-manager-2023-bugs-tracker/match-engine-art-animations-facegen-manager-creator-and-sounds/match-performancestutteringflashing-issues/
In that post, could you please include your DxDiag File. You can see how in the guide below.
https://support.sega.com/hc/en-gb/articles/9997195057553-How-to-find-my-system-DxDiag
Also, we wouldn't recommend deleting any files from your graphics folder.