It is important to manage expectations regarding hardware. While this is a "shader," it is computationally expensive.
Despite these flaws, v0.33 remained the most balanced release. reshade ray tracing shader rtgi 033 2021
One of the biggest hurdles in ray tracing is "noise" (grainy artifacts). 0.33 introduced cleaner filters, making the image look stable even at lower ray counts. It is important to manage expectations regarding hardware