No that’s stupid advice. Part of the reason there is a shidduch crisis is because of the over-reliance on the third party. In earlier decades Kosher Yidden met on their own, through the shule functions or whatever. They made beautiful families and the infrastructure for latter day ascetics to malign.
The crisis is too serious to be relagated to silly arbitrary rules like not talking to a girl on your own.
So you keep on your ways, and report to us when you are engages, married, and have children. You are too wrapped up in labels and
affectations to see the reality of life I am afraid.
Yes use a Shadachan if you wish but don’t deny others how they want to go about this.
Regarding the holocaust and shadchanim if that Rov said that there were more Kosher Yidden over others that is disgraceful you are wasting your time talking to him.
This is a very sad thread to read but tell us of your progress.