It’s not that black and white. I’ve been in far too many games where alliance outplayed horde and still lost. We have to massively outplay horde to overcome all of the obstacles on the southern part of the map and even then, we can lose.
So no, out HKing horde and losing does not mean the alliance group sucked. It can also mean they outplayed horde by a large margin and still lost because of map flaws that make it that hard to win. Just because alliance killed horde 3:1 doesn’t make them rez with the same advantages as horde. They still had to run from AS to support SFGY while horde ran from IBGY. 3 horde die and rez 30 seconds away and the one alliance who died rezzed over a minute away and alliance suck for not holding the gy?