I think you will get 180 by the end of the year no problem, you are strong no doubt, but I think you do have a small issue in your form that will go along way in helping you achieve 180. Namely the way you come up out of the hole, your hip drive is straight up/slightly back, that's what makes you look like your good morning out of the hole, try to drive up and forward a couple of inches, like your pushing your pelvis forward as you rise. A good way to get this movement down pat is to box squat, you sit back as you squat, so it gives to follow that same path as you rise up. I don't know if you quite get me here, but think of a deadlift, once the bar gets to your knees on the lift you drive the hips forward as opposed to pulling with only the traps. Try to do a similar thing as you come up out of the hole, of course not as much, but if you focus here I think you will have it in no time mate. Nice squatting, bloody strong mate, impressive!
EDIT: I had this same problem, I am not as strong as you but when I get to 130kg I do the same thing. I have been helping this with GHR work as I needed to activate the glutes more and box squatting.
Can't wait to see you smash 180 mate.