So are you suggesting that most men in their 30s can easily find a partner and that they are only single because they want to be? I think everyone knows that's not the case.

I think the issue is more so that when a men can't find a partner, society sees it as his fault for not being better looking or more likable or having a better job or having lower standards. However when a woman can't find a partner, society does not hold her accountable for any of those things. Basically there is an underlying belief that women are beautiful just the way they are and should never have to change for men, whereas a man's value is determined by how he measures up in the eyes of women. This is what I think the core problem and the source of most double standards is.