It's a means to an end, not every group will be a success, especially in the first 3 weeks. Try joining some of the pugs for flex I've had the misfortune of joining. People seem to think they should steamroll everything, instantly. Everyone knows LFR isn't going to work well all the time, Not every pug or even guild group always succeeds on bosses in flex, normal or whatever. Stop complaining - you can always re-queue, you don't have to lead the groups, find replacements or anything other than click a few buttons.