This is super real. I've got a post bac in a really well recognized institution, a number of 2nd author publications, 10+ posters and gave an invited talk at a national conference (and of course very solid GRE and GPA). I can't complain, I have a few interviews in really well established and strong institutions, but it especially hurt when my supervisors said they "expected I would get many more." This field is extremely competitive, and even getting one interview straight out of undergrad is an accomplishment! Apply to some prestigious post bacs in research you really enjoy, get full time research experience, and I promise you will have it in the bag next time around. And don't place your self worth in this!!!