For the best visual quality on modern systems, it is recommended to use Vulkan or DirectX 12 within the graphics settings, rather than searching for older, separate DX11 plugins [3, 4].
Practical recommendation
To get the latest DirectX 11 improvements for PCSX2, you simply need to download the latest or Stable build of the emulator itself. Downloads - PCSX2 pcsx2 directx 11 plugin download new