Women don't owe you anything is a common anti-social, social darwinist, incelerationist utterance used by neoliberal feminists in response to incels pointing out that women are less sexually generous than men.
Given everyone knows no one is entitled to sex, a person who says, "Women don't owe you anything", is usually saying three things:
1. I have no genuine intention to help shy or ugly men get laid
2. Society has no genuine intention to help men shy or ugly men get laid
3. And this is just
Reason why this phrase is mean-spirited
Incels already know society does not want to help them, so the phrase feels like rubbing the problem in incels faces. Someone proclaiming their unwillingness to help feels bad in general.
Moreover, this is essentially hypocritical because most feminists will insist that society provide for any want or need that women have. Some examples include free emotional labor from doctors/therapists, free housing, free food, free transportation, undeserved hiring and promotion, protection when walking around at 2 A.M., and so on.
Example of common hidden statement using the phrase
Incel: 'Once online dating become ubiquitous, less than 20% of men will have a partner.'
Feminist: 'Women don't owe you anything.'
(This exchange happens a lot between self-described incels and feminists.)
Implied meaning from feminist in that context: 'In that situation 80%+ of the men would be unworthy of women, and that would be just.'