Direct3D Shader Bug Fix & Enhancement

I'm in need of a well known shader expert to help fix bugs in my Direct3D shaders and improve the visual quality of my c++ project.

Additionally, I am currently using also post-processing effects, so experience with these would be great.

Key Requirements:
- Fix existing bug in shaders
- Enhance lighting and shadows

Ideal Skills:
- Experience with Direct3D
- Proficient in shader programming
- Experience with post-processing
- Problem-solving skills to debug existing issues

My problems:
- TextureReflection make the Model (character ingame) looks like a mess.. (light to high and it looks like a Griebby effect...)
- sharpeness feature in Post-Processing dont work correctly, but i have a c++ code, where it is working... maybe need to compare somewhere

The easierst way would be working with anydesk/teamviewer, because my project would have more than 4gb...

Example addet which code make a problem with the texture (light issue and griebby bad looking effect)

Thanks for you time!