Most of my groups have been comprised of sprouts and willing to learn, fortunately. So maybe I haven't had the experience that most people have with EX duty finder. I like teaching the people who don't know what to do and watching our progression each pull as they learn more and more. The only bad experience I've had in probably 30+ runs of EX trials now was a tank not knowing the Garuda mechanics and not being willing to learn, before eventually leaving the party after around 5 wipes. A new tank came in and we got it first try. Other than that I've only failed to finish a couple times because players left and we chose to abandon instead of wait forever to find new players.