What are your stats? Height, weight, shoe size, measured foot, size of calves, overall fitness?
relax your ankle, feet, and use more legs when you ride… Maybe more heel adjustment.
Straps too tight is huge.
No forward lean, none.
Angle of straps, burton has three ankle strap settings on most of their binding models, the new Genesis only have 2, which is why I have not bought the Genesis.
The channel is great for these micro adjustments and small problems. A little more heel?
also, try riding with more back foot, like skateboarding. don't be such a control freak with your front foot.