You're just having a bad luck streak.
I have noticed that in day time(Europe timezones), alliance wins most BGs.
At night time, same timezone, Horde wins most BGs.
It usually depends how lucky you are with queueing along with other geared people, how lucky you are that team members follow objectives and coordinate their actions.
Anyway, what you don't understand is the fact by losing games/fight, you learn more about your own class. So even a negative aspect like this, time wasted comes to mind, has a positive impact on your overall playing experience. Just play and results will come :)