You have only been at it for 4 months as a new grad. This is quite normal for new grads these days and can take longer. Keep applying to positions you actually could see yourself at, and hold off on settling for a job in a setting that you know you don't want to be in. Seriously, a new grad program is worth the wait!
Also, it seems that you are applying to positions requiring experience as well as new grad positions. These will almost always be automatically declined based on not meeting the baseline criteria. Focus on jobs you are qualified for.
But you are doing the right thing being on top of the job search. I remember for me I practically lived on the internet, and it payed off, because the new grad program I was hired into had the application open for only an hour, and I got a call for a prelim interview within an hour of submitting. So for me, the timing was a big factor, and the fact that I was searching often, not just once a day. Because hospitals do sometimes post the new grad app for a short time to limit and select among less candidates, as they know there are 1,000s of equally qualified candidates.
So just keep plugging away, focus on new grad programs, and remember 4 months is not very long for new grad rn jobs, expect the search to take some time. u can consider going into panic mode at 7 months