Unfortunately, the Oilem is to blame, bigtime, for any transgressions that come to pass in this area. Hashem sees everything.
Aside from the Yechidim who sincerely put blood sweat and tears into finding Shidduchim for singles who arent close friends or relatives, we are sorely lacking Shadchanim who really care about others and are willing to invest the needed time and effort, with the exception of those seeking the uniquely big Shadchanus fees.
Im not saying Shadchanim shouldnt get paid, they certainly should, but the vast majority of Shadchanim today work much harder for their rich clientele than the middle class, if they’re willing to work for them at all. Most Shadchanim with familiar names arent reachable by the middle class. Unless of course, a middle class single is an exceptionally good match for an upper class single (stunning middle class girl, or brilliant middle class boy).
There are very few Shadchanim who do as much as return phone calls from people whose last names they dont recognize.
If Im wrong, the genuinely idealistic and fair minded Shadchanim are in hiding,IF they do exist, and the public is not aware of them, which is the fault of the Klal for not publicizing them, because it is the Achrayus of the Klal (meaning me and you) to care and do what is neccessary to get results for all singles.
I hate being negative, but these are my recent observations.