I had a fair amount of luck on Match.com last summer. Hopefully my perspective helps and I apologize if I repeat anything posted earlier.
First, are you targeting the right group? If, say, you are heavy, you probably won't attract many fitness buffs. Same thing if you have a kid and target a spontaneous person, and so on.
Second, how are you selling yourself? Think of it like applying for a job you want. You need to play up your strengths to interest a lady you might want to be with.
I was early 40s and was looking for someone in that range (or maybe a bit younger) who was also a parent. So, without lying, I emphasized my best traits: well-educated, reasonably successful, responsible father (kid comes first), ambitious, intelligent.
I had a decent number of women reach out to me (was surprised by that). I recall having around five conversations going (besides another IRL encounter) and that was more than I had time to pursue, so I chose a couple and hid my profile.
The point is that it still is a numbers game, but it seems if you choose your targeta and present yourself well, you should get a reasonable number of quality hits.
I cannot emphasize enough that you need to have traits the ladies want. For instance, being attractive is great but I do not hear women complaining that guys available are ugly, fat, etc. I hear them complain that guys available are stagnating, lack ambition, are irresponsible, etc.