Cameltoe, you've been really unlucky there, these things are highly stressed at the best of times but you tackled it in the best way you could by adjusting in small increments.
Interested to hear what a luthier recommends though as suggested a second hand neck on here may be a more cost effective alternative.
Regarding shims, as Luke FRC says they are no big deal. Remember Fender's own micro tilt system was effectively just a variable shim. However no micro tilt adjustment or shim will improve a bowed neck unfortunately.
A bad start to the new year for you, let us know how you get on.