Guild Wars 2

Scenario about GvG ethics.
15v15 scenario

Guild A: Has good class comp, runs the “guild perfered” builds, Listens to one commander/driver, very experience group in Zergbusting and GvGs other guilds frequently.

Guild B: No class comp, running their own roaming builds, No one drives them and tells them what to do, very experienced solo-roamers/small scale players and are considered the best roamers of the that entire league.

Fight begins, Guild A gets aced by Guild B. Guild B wins and no one is downed out of all 10 rounds. Guild A tells Guild B not to GvG anymore because using small scale tactics is considered bad manners because it shows no player cohesion/team skill. Reason why Guild B won was because unlike Guild A, They were very spread out and easily kited bursts while consistently applying so much pressure that Guild A couldn’t back off to blast water. Instead of the typical ball vs ball where you have them bursting and pushing and running out to recover, Guild B ended up surrounding Guild A and everyone that fell away from the group was stomped while the rest where just being bursted then kited to death.

Was Guild B in the wrong for not having a “comp” and basically accused of “Cheesing” the GvG? Or are there set rules to where you have to have some standard?