I'll give my unsolicited opinion.
At the end of the day, I feel that a big part of this issue is simply a matter of supply and demand (as yucky as it may feel putting it in such terms).
Let's be honest here, when most men talk about "dating" and "relationships" that often includes a heavy sexual element, at least in relative terms to how women use it. Not to say it also doesn't include an emotional aspect.
Whether it's because of biology, culture, a mix both and any other possible factors us men seem to be on average a whole lot more fixated on sex as a goal unto itself than the average woman. This simply means that, again on average, men will be far less picky when it comes to trying to find a partner which in turn gives women, relatively speaking, the ability to be much more selective.
Now, some types of men will often think that such a fact means women are inherently privileged in this aspect but this is often because they haven't meaningfully interacted with a lot of women and they think they're simply men with breasts. In reality, at least in my personal experience, women value sex by itself a whole lot less so the option to simply sleep around with whoever isn't particularly appealing. Of course, some do, and I'm sure they have a grand old time.
Another factor at play is that I think there's a cultural tradition of friendships between men and other men being fairly shallow and surface level while those between women are usually allowed to be deeper and more emotionally involved. Add to that the fact that deep friendships between men and women are relatively uncommon, there's even such a silly idea like the "friendzone" that seems them as even kind of negative, simply because so many men are so obsessed with sex, or simply do not know better, that they cannot see a friendship with an available woman as anything but a stepping stone towards sex/a romantic relationship.
At the end of the day if one is man that's generally sexually unattractive for whichever set of reasons, well it's tough but there's no way around it, that's the reality of the free market, to call it something silly. But if you want to feel less lonely then you should genuinely aim to make true friendships with women just for it's own sake, not with the hope that down the line you'll get your chance at something more.
Despite being heavily unappealing in multiple ways I once had a few women be attracted to me that really shouldn't have (dumb luck I suppose) but what I truly miss the most are the lady friends I once had, they were warm, caring, gentle and understanding and in turn I tried to be the best friend that I could. I really like women and by that I don't mean just physically, I just liked being around them far more than I ever did with men and it was far simpler to be a friend since the "requirements" were often a whole lot lower for evident reasons.
Yeah, there's nothing inherently wrong with desiring sex. But at the end of the day there's pornography and sex workers and whatever, I say it's better to try and form emotional connections just for your own sake but also to do away with at least some of the desperation. Finding a romantic/sexual partner should be a goal, of course, but desperation makes that the goal of their existence for many men which tends to make everything worse.