What you discovered is that women peak in their desirability in their 20's, while men reach their peak in their 30's. The reason is that men prefer younger women, while women prefer high-status men. A 35 year old man can date unattached women down into their 20's, while a woman of 35 will find the number of suitable single men in her desired age range (32-40, or so) to be much smaller, AND the more desirable ones are chatting with younger women.
A guy at the OkCupid dating site wrote an article on the suject The case for an older woman, where he suggested young guys (20-25) who are not having much luck with girls their age, consider dating older women.
I read that suggestion and just laughed. While it’s true that younger 20-something men and older 30-something women are the two “out” groups, saying they should just hook up completely ignores what men want - hint, it isn’t older women.
Depending on the country you go to, 60-70 year old men can get quite a bit of action. Just saying.