crt-royale runs pretty bad on switch port

[dreammask-tk]

Game details

SLPS01057 Final Fantasy VII International (Japan)

Description of the issue/bug

when I enabled post-processing and added crt-royale shader, the game showed so glitchy that actually can't play any further due to the completely broken graphics

plus, I want to know how to edit shaders in switch port so that I can adjust them accurately

Steps to reproduce

enable post-processing, then add crt-royale shader and just wait

Software and hardware information

switch lite with AMS 1.7.1

DuckStation version

Prerelease 2

DuckStation rendering backend

Software

DuckStation controller backend, drivers and wrappers

default

Additional context

No response