I would suggest squatting on the floor rather than a wall.
I would suggest squatting on the floor rather than a wall.
Check your back angle. Do you see how vertical it is? It's making your knees travel forward at the bottom. The knees go forward a little during the first part of the descent, and then they stop moving, while hip flexion takes you most of the way down.
I was told to really push my knees out and then imagine that there was a door behind me that I needed to open with my rear end. Maybe it will help you.
Also, you are going to hurt your elbows if you keep your wrists like that.