If you are using a modern build, you can likely upscale the graphics:
PCSX2 has moved away from the old "Stable" 1.4.0/1.6.0 releases to a (similar to DuckStation). pcsx2-1-4-0-fr-bios-inclus-7z
Go to the PCSX2 Downloads page and grab the latest Nightly Build for Windows, Linux, or macOS. If you are using a modern build, you