Personally, I think matchmaking from solo queues is the biggest enemy to teams in random battlegrounds.
Seriously, in many instances in which your team loses, it’s because your entire team is basically nothing but DPS with maybe one healer, and usually no tanks at all.
Team composition does often matter more than strategy or skill (more so in small BGs compared to Epic BGs), especially when one team has multiple healers, at least one tank, and has the ability to stun-lock spam on top of all of that while the other team has basically none of that.
Good luck winning a match in Warsong Gulch if your team has one healer and no tanks while the other team has like two or three healers, a tank, and three or more Frost Mages and some BM Hunters and Demo Warlocks for good measure. I’m sure it’s possible to still win, but it’s a lot harder due to being greatly outmatched in utility.
Bad players are always a factor of course, but team composition can definitely make or break the match overall. It’s stupid how often you get stuck with the 99% DPS teams in randoms.
My point is simply that there are more factors to losing streaks than player skill and ridiculous conspiracy theories.