Isn't getting knocked back, no reply, no shows...etc just a part of every day life? Including your sex life. Even on a site like this, a nightclub, a bar or anywhere you can meet a partner.
It is the 'Law of Averages in Sales", you need to make 10 contacts to make 1 sale. I am not saying the process should be impersonal but it not everyone will be a match, some are just here for a flirt and some people don't know how to say 'no thanks'. Don't worry about the No's (however they are given ). Stay positive and keep saying hello.
I do understand your frustration but being bitter about it will only get in the way of the next meeting.
Sex is like oxygen, not really a big deal until you are not getting any!