The major problem is the lack of research done. If you want to hit the dungeon all cowboy style, then do so. But if we're talking about raids. You need to be well informed on the mechanics. This is nothing new of course...MMO's have existed since the 90's, if you're still in the dark about how to do anything, you've either been living under a rock, or don't know how to use a search engine. There literally is only one excuse you can have for being bad at a game. And that's lack of actual, practical, skill. I'm still surprised to see either dps doing horrible rotations (late game) and healers not dp/dot-ing.