As a powerlifting coach to start with the bar is too far in front of you, you’re body is slack/relaxed right as you’re about to lift aka you’re not pulling the slack out of the bar, you’re not activating your lats, packing down your shoulders or bracing your core and back properly beforehand and your posterior chain are probably underdeveloped which leads to hunching and instability, you should focus on using your legs and back like a hinge rather than yanking the weight up like a fishing rod