Work on setting up by sitting straight down to the bar. This should immediately start to put tension on the hamstrings and hips. Get set into your stance first and work your way down to the bar before grabbing it with your hands. I think you mentioned Dan Green. Look at his set up. Not saying do it just like him, but his set up is what I’m talking about. You may not always have to do it this way but it’ll get you the idea of the correct position.