Tired of the small sizing....arrrrrg!

[Irulan]

Commercial clothing patterns are drafted for a woman who wears a B cup bra. If you're a D cup or larger you will unfortunately never get a great fit. Unless you're in the plus size range - plus sizes tend to be drafted for a C/D cup.
I have the opposite problem -

This is only correct if the fit model is a B cup, in the base size that everything is graded from. There is zero standardization in women's sizing so it should not be expected. The only standard in women's sizing is the "grade" the calculations made to grade a pattern up into one size form the next. And it's not proportional.