Matchmaker, Matchmaker
Make me a match
Find me a find
Catch me a catch
Matchmaker, Matchmaker
Why do you offer to others
Yet look right past me
Matchmaker, Matchmaker
You ask my opinion on your matches
Yet forget that I am there too
Matchmaker, Matchmaker
Look out for those closest
As your supporters are your biggest allies
Yet dissenters can be harmful
Matchmaker, Matchmaker
Overlooking can be hurtful
Right in front of your eyes
Yet far from your mind
Aviously 
I have never been to a shadchan, but from what I hear, they hurt MANY PEOPLE in the manner that you describe.
There are shadchanim who still haven’t got back to me. It’s been 2 years.
I have friends who never respond to texts in that long!