because its the same as lfg, any decent groups will never take a mage, been playing them since they were released, even when guild groups would earn gold in bank for making a rbg group, and i could never be in the main roster, its always the same, i even faction changed, and moved server for my guild just to sit benched, nowdays i just lfg by myself and i made my own guild for storing consuambles for pvp. i stopped even trying queueing for lfg, since i reached a pretty decent rating, and im done ruining with the few groups that are willing to take a mage on a no voice, like, 1 arathi basin i was at 9 ninjacaps, and we were still losing the bg because those are the kind of groups i can join, no voices, random people, with low gear, and very low effort x)
had a good team in bfa season 1, but half of them quit to play classic, and then they quit that one too, and we disbanded, we were playing at 2.6 mmr, and for once it felt like we were going somewhere, having fun on voice and so on, after they quit, we are back to square one, link hoth, play a different class or spec, etc etc
so, i q normal bgs, and i treat them like rated, with w/l and all, and i work on ninjacapping and teamfighting there, obviously a bit frustrating since there is ton of people who enter with 0 gear and sit afk in a corner but i usually sit at 60/70 winratio when i try a little, all im aasking, is to have rating tied to the same thing im already doing, not rly hard.