Honestly, this is just bad attitude.
Are you at a disadvantage compared to a BM? Yeah. It's it because of gear alone? No.
Learn your class's strengths and weaknesses.
Learn how to PvP in this game. You are inexperienced, and part of the BM destroying you is your inexperience, not just his gear. Do you think you could jump on a geared character and dominate? You aren't that good..yet.
EDIT: Typo