Gosh, that bar hurts my shoulders
Can you place it any lower? Have the rear delts support the bar? When the traps support the bar, it's soft tissue. Ends up hurting big time. But when you get it lower, if you can, it really makes a difference.
I used to need the pad or manta ray or towel to squat. Now I can do the bar and it feels just fine. But my rear delts end up supporting it.