Most of your problems are knee related. We want them to be in position 1/2 of the way down and to stay there. Yours are sliding forward throughout the entire descent, and caving in on the way up. I can't tell if the stance width is causing this, but I would concentrate on KNEES OUT and BUTT BACK. If that doesn't work, move the stance in an inch and try the TUBOW drill. Also, pin your elbows to your sides. They're a little too high.