My truly deep resentment has always been toward Bokken (I have very thin wrists), but all weapons work really challenged me for awhile. I knew I was really bad at it because my weapons teacher would (literally) wince whenever I did an awase, and for a number of weeks it was standard for me to keep practicing start-stop after everyone else was allowed to start flowin'.
It was embarassing to be in this remedial weapons class of one, but you know, it made me practice harder and now I love my weapons because I can practice without a mat or an uke. My suburi are much, much better, and yes, I'm sure it's helped everything else.
If I could get better, ANYONE can. Hang in there!