There was a time when GAF was favorable to Xbox. It was back in the 360 era, when Xbox was doing very well. Since then, not so much.
GAF is pretty rough on Xbox now, of course, and for the past two generations. Some of that is just a reflection of broader opinion, as others are saying. But some of it is self-selection. Members who like Xbox tend to leave or take distance, because the atmosphere is hostile to them, which leaves an increasingly anti-Xbox, pro-Sony crowd.
If I were a staunch Xbox fan, I would probably follow that same pattern. I would find it hard to be around here, because it would dampen my ability to enjoy gaming. I would probably seek out more Xbox-friendly spaces.
I'm a little curious about why we have Xbox gamers who stick around. Do they like the warz? Do they have a long history and ties here? Do they just have a thick skin? Do they not want to sequester themselves in an echo chamber, so they seek out contrary opinions? Are they masochists? I don't know.