Stance is too wide. Bring your heels in under your shoulders and turn your feet out a bit more.
Your upper back is flexed and your elbows are too high. Grip is a bit wide, too. Hands are draped over the bar, exacerbating the thoracic flexure. Get your wrists straight or just barely extended.
You’re far too upright overall. Take a hammer to that mirror. Look at the ground in front of you at the base of the wall where the mirror once stood. Lean over at the descent and sit back to depth.
Delete “butt wink” from your vocabulary.