Suppose there are two couples:

Alice and Bob have sex. Bob has one orgasm and Alice has three .

Carl and Diana have sex. Carl has one orgasm and Diana has zero.

If you count total orgasms, men got two and women got three. So the orgasm gap is in women's favor.

If you count people who didn't orgasm, that's one woman and zero men. So "getting at least one orgasm" is in men's favor.

The conclusion would be that men's orgasms are more evenly distributed, while women's orgasms are unevenly distributed.

There's no overall orgasm gap hurting women, it's just that some women are hoarding all the other women's orgasms.