You and your raid need to stop being terrible, first off. Second, you should stop trying to defend your poor play and learn from the folks in the thread that are giving you correct advice. Third, and most important, lose the attitude when coming to the forums crying. It's been pointed out numerous time on what you are failing at. Just because you killed it a few times before doesn't mean you are an expert at the fight.
Learn the mechanics and you won't look so foolish in the future.