Airline hiring is extremely cyclical. There's a frenzy for a little bit, then it dies. Rinse, repeat. Seems like right now we're in a down cycle, and now that Great Lakes has crapped the bed there's a bunch of displaced dispatchers that have been dumped into the pool. Not saying all of those are going to be looking where you're looking. When this happens there's a contingent that leave the profession, some hook into supplementals, and one or two might angle into a major.
In any event, I think what you're going to want to do is evaluate your F2F interview style. Unfortunately, we seldom ever get feedback from an airline (or any company) about why we were turned down, though that information might be extremely valuable! Try to relate your past life experiences to your present vocational interest and how those experiences will make you a good choice. A face to face interview is much more about WHO you are than WHAT you are. I've got a resume in front of me. I know you're qualified and I know what your credentials are. Now I want to see how you relate to people, pressure, deadlines, etc. I want to see if you're open to receiving constructive criticism in a positive way. I want to see if you think quickly on your feet. I want to know if you're creative (but not TOO creative). If I'm a regional hiring manager, I'm likely not going to be diluted into the idea that you're going to be here 5 years from now. I just want to make sure that when you're here you're HERE, if that makes sense.