I could write the same advice you've already been given. That you're really misunderstanding the situation. That a transfer between programs is very complicated. That moving programs most often happens at each PGY transition, and that makes things even more complicated and difficult. That most likely any new program PD is going to want to talk to your current PD to find out one thing -- are you a "problem child", because no program wants to inherit someone else's problem. That just leaving your program isn't "no big deal to fill" -- it's a huge problem that leaves your program in the lurch. I could tell you all of that -- but it's all been mentioned above.
So I'll give you this piece of advice instead: Go to your current PD, and run this idea by them. You seem to really respect their opinion. Ask them if this is a good idea. I expect they will repeat much of what you've heard here, but perhaps it will be more impactful for you.
I realize you're very unhappy with your match. You fell far down your list, which is always a disappointment. I can't be certain why this happened, but I do worry it's related to the poor communication issues you're having on this thread. Similar issues may have come up in your interviews, or rotations, and you may be completely unaware of it. Regardless, although I know it's not the advice you want to hear, your best option is to go to your new program, make the best of it, and be the best resident they have ever had. Many threads here on SDN bemoan a low match, and then the poster comes back 6 months later deliriously happy and states they would have ranked the program much higher had they known what they know now. Maybe that will be you. But your chances of success are poor if you go into this with a negative attitude and your primary plan being to transfer somewhere else.