AZ – I think first you’ve got to make the point that there are more girls than boys available. Just because they are not married, does not mean that they want to get married.
Also, even if what you are saying is true; in the area of shidduchin, Hashem is the authority over that; He is m’shaddeich z’vugim and He made the reality what it is today. We think that hishtadlus is in order for shidduchin, but unlike parnosa, that’s not the case. The torah does not teach us that the Avos were mispallel for shidduchin.
So don’t double guess how and why Hashem wants things done.