There was a shidduch crisis 60 years ago – it was Jews marrying other peoples. The alleged “shidduch crisis” is not about how to approach people, it is about rapid growth of the community, B’H, and thus, there are more boys than girls 3 years younger. Even without shadchanim, girls would want more mature chatanim, and boys would want younger kalos.
I am thinking one of the problem of the current system is that there are many people who do this professionally that may disregard matches that are not advantageous for the shadchan. A solution is simple – try helping singles find a match through your own contacts.