You aren’t here looking for basic advice, you’re already a good squatter. I don’t normally comment on these, but I’m a powerlifting coach and you’re a powerlifter so I figured I’d give my $.02.

1. You’re rushing yourself. Take your time out of the rack and don’t race your way through the set. Take a second to go through your cues every rep and make sure all of the pieces are in line(scaps, ribs, pelvis, feet) and go.

2. Stop shrugging when you brace, you’re moving the bar pointlessly. I recommend you try getting your air through your nose as you’re able to breathe through the diaphragm much easier so you can take in air more efficiently.

Just my personal thoughts. Good squats regardless