I’m not sure what is in your cover letter, but the only thing I can think of is maybe you’re coming across as too much of an airline guy on paper. You should definitely emphasize your military desires as much as possible in the cover letter, only mention you’re an airline pilot because you have to but otherwise everything else needs to be about how bad you want to be a military pilot.
With the current fighter situation and the amount of slots…I would seriously expand your search to the unsponsored reserve board or look into AFSOC OA-1K or ACC heavies like the HC-130J and do Spec Ops/Rescue if not fighters. Consider bombers as well. B-1 is not a bad option if you still want to fly fast…it just breaks a lot lol.