Hi OP. I read an interesting article on this the other day. Not sure where, but it generally said that there are more individuals who choose singlehood over relationships. I am in my 50´s and one of those who has long given up on even wanting someone in my life. And I stay clear off the opposite sex. Some men, similar age to me, just want someone to look after them, cook clean, sex, and give them all the moral support they need, but do not want to engage in "difficult women. Meaning women who know their worth.
I am not sure there is a theme generally, you sound younger than me, so its a sad place to find one self in. Not to mention feeling so lonely at times, it sucks.
Its like men tend to lean way too much on what us women use to be like, now we just moan, dont want to be sexy, or we are too sexy, too educated, or we are not exciting enough, maybe there is a better one out there. Not all men are like this, or women, may I add. It works somewhat both ways.
A good friend of mine is 20 years my senior, she is stunning, has a great job, and her life in order, yet she is unable to find a man to settle down with. They are all searching and swiping for the perfect woman, yet take offence if you are somehow doing ok in life, and its as if they need to take her down a notch or two, how dare she be successful. Mind blowing. She is also someone who has decided enough is enough, she is wanting children so will go down that route sole now as she is unable to find a partner in life, only a man child. And there is a lot of them out there.
At my ripe age, I see how easily people are discarded off, and with one swipe or another, someone new is on the arm before you can blink, and then they get discarded, and so it continues. No one really bothers with knowing who they truly are, as an individual, and or if they make a good partner, or if they are holding onto toxic behaviors because they lean way too much on what social media has thought them, to be like, and some of those things is mind blowing and very toxic and dangerous towards women.
I am sorry you are finding yourself lonely, but glad you know your own worth.