Help with job search

first off, i work at a very large hospital in a high acuity ICU for the last 3 years. I have about 5 years of ICU experience, prior to my current ICU position i worked in a trauma ICU and have all the certifications that come along with that TNCC, CCRN, pals, etc.

I have been trying to get into the ER for about a year and a half here at my current job. Im desperately looking for a change of pace and im very burnt out.

There are always openings for RNs in the ER at my current hospital, always!! i started applying over a year ago and always got the generic "Sorry, we have chosen a candidate with more experience"

So to help, 7 months ago i got a supplemental job at another er here in town but it is not a trauma center and low acuity. Ive reapplied for an ER job again this week and already got a rejection email with no interview. I just dont get it. What more can i do? im so frustrated and feel like ive hit a wall.