Your upper body is rigid. There is crap movement around the shoulders, they are up rather than down, and your upper back is not moving smoothly. Mobility work and stretching can work–I never said it wasn’t good. I said simply looking at a number (as in, peak ROM you can reach in a given stretch) isn’t a good idea nor is it a good indicator of tissue quality, which is more important and probably more related to your hip tightness. Further, people can and often do cheat on stretches, which you are likely doing as well, which is going to create a false negative.
Stand beside a squat rack, just touch it with quad, hip and shin, you knoiw a straight posture. Now bend knee and hold foot with hand, push knee back, do you know this pain, if not you are cheating with the stretches too.