It's this map.
Words can't express how much I HATE this map. It encourages gangbangs. Bishop, Knight, or Rook, there is rarely a time when it's not 2 on 1 for extended periods of time. Want to sneak a base? Hit the enemy where they don't expect it? Forget it. Bar Dar prevents it. So, you have two fronts, neither of which is over 3 bases wide, and usually two. They know where you have to come from. They know where you are going. It's no wonder that, night after night, the entire MA condenses into massive furballs over A1 and A39. There's not much else to do.
The Rooks have been reset twice in the last 24 hours because the Knights and Bishops have spent massive amounts of time NOT fighting each other. Put that together with 70 Bishops, 45 Knights and 30 or so Rooks on line, and you have an experience that is decidedly not fun for Rooks who care about strategy and winning resets. I'm sure it's the same with the other teams, on the rare occasions when it happens to them.
Combine it all with the fact that, being the contrary, independent cusses that we are, none of us on any team can seem to work together, and it gets even worse. This could be addressed by HTC if they would make participating in a mission and/or winning a reset WORTH SOMETHING. Perks just don't cut it. Most players don't feel that perks buy you anything worth having anyway. An Arado, a Tempest, a 152 or a CHog, big freaking deal.
Any more, the only playtime in AH that I find worthwhile is when we have enough Mullets (tm) online to make our own in-house missions for taking bases, or to defend hotly contested bases. When we're together and having that kind of fun, even the many deaths attributable to my own stupidity don't seem so bad.