Is this guy banned already??
Anyway, I have the Broxa and I find that for the price I paid for it, I can't say anything better about it. Good weight, solid feel, reliable performance, etc. even in the winter. I have had no problems gaming it and have made lots of kills. Another buddy has the same experience with his. You must have gotten a dud, which sucks.
I don't think that the hop-up is compatible with TM rubbers (the only thing on it that's not TM compatible). I'd suggest what I plan on doing to mine: changing to a good quality hop-up and a tightbore barrel. You'll hit your target every time.
Anyway, that's my $.02