Flints,
My TP experience pretty much mirrors yours. It started off slowly, just a little "tick" in my shot sequence, then manifested into a full blown train wreck. I could anchor, aim and hold on anything I had no intentions of shooting (like a brick), but as soon as I knew I tried aiming at something I wnated to shoot, the whole thing went in the pot again.
I can't begin to remember how many different ways I tried curing it. Blind bale, draw-aim-let down drills, whatever...I think I tried just about everything out there. Nothing worked for me. Reluctantly, I started shooting with a click a couple years ago.
After a few months of learning how to use it properly, the difference was night and day. I'm more in control of my shot now than ever before. Honestly, if nothing else works, a clicker is the best thirteen dollars you'll probably ever spend.