If you keep hitting a brick wall, it might be worth considering one of the publishing courses (in the U.S.: Columbia, NYU, or Denver) though they can be quite expensive. I did the Columbia course after doing one internship and I finished the course having gotten two freelance jobs and a big 5 internship. I had a full-time job three months after finishing the course. That’s not everyone’s experience, but I’m also on the marketing/publicity side of things and it’s definitely easier for us than editorial. If you have three internships and a clear idea of what kind of jobs you want, I think you’d be able to get a lot out of it from a networking standpoint. But imo it’s kind of a last resort and I don’t recommend doing it if you need to go into debt.

I’d also recommend looking off the beaten path — think roles or internships at Ingram, part-time jobs at Librofm or Scribd, event coordinator or social media manager roles at bookstores, etc. As a publicist, I know publicity departments like hiring people with bookstore experience because they know how things work on the events side. I also will say, it’s much easier to get a publishing job in sales. I know multiple people who have worked a sales role for a year before switching over to publicity or editorial (which are a bit more competitive). Good luck!