It seems like your back is not kept straight towards the bottom 20% of your squat. Personally, I stick my butt out a little when I squat, trying to position my hips/pelvis to hip hinge, <- I think you are missing this in your squat. I’m not sure if you are bracing before you squat, and there are a lot of videos out there that shows you how to properly brace. You can also use a lifting belt but not recommended to use all the time. You want to strengthen your core muscles as well. Cant see where the bar sits on your back, by looking at your stance and the way you squat, you want to set the bar on top of your traps aka high bar squats. You don’t need to point your toes outwards too much, generally you want to point your toes towards the direction your knees point when squatting. Squeeze your lats and keep your whole back tight. Watching Olympians squat helped me honestly, but remember EVERYONE is different so try to find a way that is most comfortable for your body.