The longest point of the golf swing is a vertical line straight down from the front shoulder, down the arm, down the shaft to the ground. This is the bottom of the swing arc (not in the middle between your feet). This point is where every throwing sport pivots… any throwing movement pivots around the front hip. This is where the hips can unwind the lower body and shoulders to throw the arm. The golf swing also unwinds in the front hip. Not in the middle between your feet.
Now, the backswing winds up around the spine with slightly more that 50% weight maintained on the front foot… but again, the downswing unwinds around an imaginary vertical line about where the front hip rotates.
If you are not in a position to comfortably rotate around this hip, you have too much weight on the back side (probably from sliding during the takeaway).
As a drill…you can put most of your weight on the front foot and keep it there (no slide on backswing) and take little shots to feel how the swing unwinds around the front hip… Ross