What is the opinion of Reddit about the
Weightlifting Movement Assessment & Optimization: Mobility & Stability for the Snatch and Clean & Jerk?

I can’t say what exactly is causing your problems and therefore I don’t know what specifically you need to fix.

If you don’t have access to a good coach around you and you’re willing to invest time and a little money, I recommend picking up Henoch’s book: https://www.amazon.com/Weightlifting-Movement-Assessment-Optimization-Stability-ebook/dp/B06Y4NZHV3