No one to blame but SE. Why? Because they were the ones who setup their testing THIS WAY! Every game will always have a rush of testers and once the game is released. But many of the betas and game releases I have been part of, the developer learned something from previous failures. SE seems to have learned nothing. They could have sent closed beta testers their new keys days ago but they didn't. They could have phased in region by region for open beta and THEN start in-game logins today. But no, in their minds having everyone who wanted to get into open beta flood their servers exactly at the same time would be better. Mistake after mistake isn't an excuse it's just another mistake.
Phoenix Server, Final Fantasy XI (Retired)
Etoh 75 Warrior, 75 White Mage, 75 Black Mage, 75 Summoner
37 Ninja, 37 Red Mage, 37 Samurai, 37 Thief, 37 Monk, 37 Blue Mage, 37 Dark Knight
Volkmar Server, Warhammer: Age of Reckoning (Retired)
Diabolos Nox R40/RR80 Sorcerer
Greasuss R40/RR68 Choppa
Rhra R40/RR63 Zealot