Wow, thats a load of nonsense to say the least. It's not snowcrows fault that you don't understand your build and are incapable of adjusting to situations. They have no obligation either to change their builds and stuff to carry you. Also it's by far not as dramatic as you make it sound, all people make mistakes, and unless theres a ton of it, it's not a big deal either, if you make too many, perhaps you should practice and learn the encounter instead of blaming others. Take some responsibility for your own actions instead of blaming a guild that provides free knowledge and suggestions for people.The real thing killing raids are many people in and around the scene. Trying to force their expectations onto each other.