I was under the assumption Battlegroups are restricted to just Arena and RBG's now - Not random Battlegrounds?
Maybe I'm just misinformed but I'm on Bloodlust now and I'm getting people from Emberstorm constantly in randoms.
I've played both Horde and Alliance equally and I've actually been farming to complete 25k HK's on my main over the past month.
The farming has been on Alliance. In full PvE gear.
(I was requested to drop my PvP spec until we get H-Madness down due to having to swap between Fury and Arms almost non-stop.)
I'm noticing a fairly equal win to loss ratio and the only thing I've noticed makes a difference is if people actually listen to whoever is barking orders or not. In a random - Coordination appears to be far more important than a full set of PvP gear at this rate.
Skill > Listening > Anything Else
OP,
I think you've just had a very bad string of bad groups with players who are well, bad.
I'd suggest grouping up with some friends and guildies as I've found it makes a world of difference.