It’s because the alliance kiddos want to blame everyone but themselves for loosing without guild premade.
Will blizzard ever fix this? Doubt it unless they change the algorithm for bg queues.
5-30 ppl sync queueing should be detected and detour everyone else into separate bgs or have them be put into a longer wait time, let alliance get a taste of horde bg queue time that we have to endure a 1-3 hour wait time to throw off the premade ability