The guilds you know that prepared for this were wasting their time from the start by expecting a completely functioning and flawless system. The intention of this being a test was pretty clear, and not to expect something like this is pretty absurd.
They've got a lot to work on right now with EoD, and this test is still happening in just a few weeks. Real data gives you real results that an internal stress test can't ever accurately reproduce. At the end of the day, get over it or leave.