I am going to play devils advocate for a minute here, and I dont know you from adam, so dont take this terribly personally, but have you thought that YOUR the problem in these interviews? I mean you have been on a ton of interviews and cant close the deal. Take a long hard look at yourself, how you present yourself, you package, your dress, your confidence, your attitude. I struggled in college to land an internship, I was a douchy frat boy who thought that made me the shit. I knew I was qualified, I knew I was smarter than anyone, but I had such a shitty attitude and presentation. Once I realized that it was more important to present myself better, and I made a few adjustments, I had no problem landing a gig.
I am not saying this is whats going on here, I dont know. But take a look. You have had posts on here before about how you cant get a job, and how your resume sucks, and how your all depressed. Learn to look on the positive, to be positive, to project confidence. You will do fine.