Are you saying the first set you did was at 175lbs and that felt heavy or you did something like:
Set 1: bar x 10
Set 2: 70lbs x 10
Set 3: 90lbs x 8
Set 4: 110lbs x 8
Set 5: 135lbs x 5
Set 6: 175lbs x 5 (work begins)
But you didn’t do some crab walking with a hip circle first and that was what made your squat suck?