Why are western men facing so much sexlessness?

Why are American women only going for the top 20% or top 10% of men ? There must be something wrong in the developmental characteristics, nature, outlook, or temperament of the modern western man. From a woman's perspective, it doesn't make any sense either, shrinking their dating pool so much. But they are doing it bcs MAYBE there is something wrong. Either with the men or with the women.

I don't think men of other races are facing this issue. Elsewhere in the world and in history, men didn't face this issue.