My very first time doing King's Fall, we had 2 LFG guys. They were told prior to joining that it was a sherpa run, and there were people who hadn't done the raid before. They were made aware that there was someone with less than 400 Light in the group. They said it was fine, joined in, agreed to play through the run. We get to Warpriest, my clan leader is explaining the encounter. Partway through the beginning of his explanation, one of the LFG guys speaks up over him and says "Wait, if someone hasn't done the raid before, why don't they just look up a guide and watch that first?". If they'd said it curiously, like they just genuinely didn't understand, it'd be one thing. But there was snark and arrogance DRIPPING off every word. He wasn't asking because he didn't understand. He was asking because it'd be faster to watch a guide and he couldn't fathom the idea that somebody would want to experience the raid firsthand instead of watching it play out on youtube. Clan leader calls him out on it, gets back to explaining, we move on. I get the buff and have been so confused up to this point that I panic, and my clan leader told me where to stand, but then I can't find any enemies. At all. So I can't keep the buff going. We wiped because I couldn't find any enemies, and instead of getting a "it's all good" or "it's fine, we'll run it back" from everyone, the LFG guys got irritated, asked why I wasn't killing anything, and asked me (rudely and rhetorically) if I'd ever gotten buff before. The entire raid, any time I'd slip up, they had something to say about it, knowing this was a sherpa run and with me telling them multiple times it was my first run. I ended up backing out at warpriest, because around the third or fourth time we wiped, I was so pissed off at the raid and at those two that I just didn't want to bother with it anymore. LFG literally ruined my very first raid experience, and the result was that I wasn't even willing to go into CROTA until months later, because I just figured EVERY raid was going to go like that.