Just had what I must consider my worst dungeon run ever. Cutter's Cry. I was tanking, and everyone else were sprouts. The dps players did just fine, but oh boy, this poor healer...
We wiped around 10 times, and shameful as it was, I'll admit, I deserted Cutter's Cry after 40 minutes. The healer first died by randomly standing in sandquakes for a minute, without noticing all the damage. Then we died on a medium-large pull. The healer is for some reason always standing at max range, far away from everyone and I die by the time he runs within range to heal. So I decide to pull less. We eventually get to the second boss later on, and I had to teach him what Esuna was. (how does so few sprouts in the 45-50 range even know that Esuna is a thing? I swear, read your abilities!) He died and we wiped twice to the second-boss sand worm's buried charge, the healer isn't paying attention. I then try a medium-large pull again, being confident that we'll survive the pull with all my cooldowns up. No, we die again, because the healer is yet again standing in bad (blue geysers) and not paying attention.
Then we get to the last boss and I explain the dragon/violet mechanic and the ram/blue mechanic. The healer gets ko'd from 100% to 0%, immediately dies to this mechanic the first it's used, four times, and we wiped every time. Gear must've been low item level? Didn't check. I just couldn't utter any more patience in this run, it had all run out... Exhausting. The healer seemed like a nice guy, but jesus christ, please use your eyes!