"What is the appropriate way of rejecting a shidduch? If you know they won’t “get” your answer based on something you feel strongly about but it’s more personal and you also dont want them to think your picky…."
​https://www.theyeshivaworld.com/coffeeroom/topic/saying-no

"Now of course you will tell me “when I tell the shadchan that “it’s not for me” they try to convince me that it is! It’s better just not to call them back! I have two comments"
https://www.theyeshivaworld.com/coffeeroom/topic/wannabe-shadchan-sounds-off