Really sad to hear that. I've mostly had luck with random groups but yeah a good FC or LS goes a long way to avoiding that. I haven't even touched the EM primals simply because I want to enjoy it with the FC ppl. Hell I only got into coil for the first time this weekend with a FC group. We had fun, kept wiping on cad all the time but beat it in the end. Even had a few randoms there and they were patient and helpful. I do run DRlow usually once a day for one of my other classes/jobs and seems to go somewhat good but do hit an occasional odd one out. Best advice at that point is to ignore said person. And I never point fingers at anyone ever. Usually the party will figure it out that we lack DPS or healing or anything and agree to drop out and reassemble. But we never focus on just one person.

Hopefluy you'll stick around and not let idiots sour your game time.