oh, whatta pain in the derrierre!
it was for reasons JUST like you listed, that I "ceased and desisted" with the Copaxone, back a few years ago.
and two lost packages as well... argh! (I lived in a very rural area then, and it was around Christmas, with all the "temp" UPS drivers...)
I never got dull needles, but I DID get ones that failed to function.
and one box that gave me gnarly site reactions from Hades.
good luck untangling the problems, and hang in there, honey!