Do you think meeting new people in general sucks too?
I think all the people I've managed to convince to meet me have been pleasant to hang out with. It's not so hard.
There are a few scenarios that might seem bad. If you're trying very hard to make an impression, it can make the situation unnatural and you won't feel comfortable either. Another reason might be feeling disappointed if the other person is not attracted to you.
I'm quite talkative and interested in many subjects though. If the other person plays along normally, it's easy to get laid back interaction. It would have been much harder to go on dates when I was 18. And probably the "opponents" have improved a lot too.
I also respect other people's right to not be interested in me. We all have our own lives.
For me the worst part is the early part when you're supposed to get some response out of the women, to get them to meet you in person. The yield is so low that it often feels like it's not worth the effort.
I think I've gotten myself motivated when thinking of it as meeting a random, likely nice and potentially interesting person. And both of you can decide what happens after that. Most likely not much. But even then it's been a quite pleasant experience compared to sitting at home on a computer.
Of all the people I've met through internet dating, I've ended up dating with one, am friends with many and don't keep contact with a few. But all have been positive experiences.
If I reverse the "filter" idea and think about the women that have had the most influence on me, I'd say it'd be pretty hard to separate them from a general mass of good people. So the filtering has probably a really low probability roof.
In keeping with the reverse problem theme, one could of course try the Bayesian approach. You take people who you know match and examine what makes it so you get a probable model. And then apply that model to unknown people. There are probably some general models (people like this are attracted to people like that) but also person specific models (this person is attracted to people like this).