This.
I'm a man who's 5'7". I'm on OLD and I get no interest whatsoever. Given that the majority of women's profiles specify that they want someone at least 5'11" - even women who are as short as 5'1 - then I guess it's simply that I don't come up in their search results because men of my height have been filtered out.
I'd caution against ruling people out for arbitrary reasons. I don't care much for tattoos but a woman I once worked with had tattoos and I couldn't have cared less as she was such a wonderful person, so best not to get fixated on random things. You might miss out of a great person.
I've been in two long term relationships. Both with women who warmed to me over a period of time because I was around them on a daily basis. I'm not the kind of guy who walks into a room to a crescendo of snapping knicker elastic and I'm fine with that. It's a case of knowing what works best for you.
I'm an introvert who doesn't like noisy, crowded social settings and doesn't have the confidence to approach women so I thought OLD would be the holy grail. In reality I can relate to all the complaints women have about men on OLD as it looks just as grim from a man's perspective. In reality, I think focusing on yourself and being happy is the answer and, if you spend your time in the places where you're doing what you love, you'll eventually meet a likeminded prospect.
One final thing...
Don't get hung up on the notion that all men in their 40s, 50s, whatever who are single must have something wrong with them. If you're age appropriate for these men and you're also single then, by your own logic, there must be something wrong with you too!
Sometimes it's just that people grow apart and a decent man who's solvent, capable of living independently and has some standards won't stay in a relationship that's not right. Surely that's a healthy thing?