4. L’maaseh, I don’t think it should be called a crisis. I don’t think it is healthy or hashkafically appropriate to consider it a crisis and to encourage singles to consider it a crisis.
In Chovos Halevavos, Shaar HaBitachon, he states that having bitachon entails realizing that whatever situation you are in is the situation that Hashem wants you to be in. I think that referring to it as a crisis makes it harder for people to realize that.
Being single is not a crisis. Our Tafkid in life is to serve Hashem, PERIOD. And someone who happens to be single can be an Eved Hashem just as much as someone who is married.
So, no, I don’t think there is a shidduch crisis. And I do think that the only crisis is thinking that the “shidduch crisis” is a crisis.