Men's behaviour.
It really is that simple.
I tried online dating and it was truly awful: porn addicts, liars, cheaters, abusers, men with alcohol and/or drug issues and generally selfish, immature men who don't seem to be able to get their life together even in their 40s and 50s and make zero effort in relationships.
I am middle-aged and I found it really difficult to meet someone who is simply honest and kind and would add someone positive to my life.
I am happy on my own and would never want to live with someone anyway.
If I meet someone in real life then great but I am not actively looking to date.
Hopefully younger women have a better experience of dating and a wider pool of potential partners but at my age, I prefer to focus on developing my hobbies , travelling and enjoying my home, pets and life in general without having to deal with somebody's nonsense...