BS”D
If real estate brokers were as unprofessional as some shadchonim, there would have been a complete change to the system. In fact people tried all kinds of ideas online to cut out the broker and none worked. That is because brokers are regulated and licenced. Shadchonim are not. They should be, by rabbonim and batei din.
When a divorce takes place so fast, you can bet that there are hidden issues that the shadchan purposely glossed over to get the job done just as two bit home improvement contractors gloss over many details, paint everything nicely, get paid and that’s it. (Again, the CONtractor can be sued or prosecuted. A shadchan can’t.)