You should learn to recognize the signs of a failed run early on, and then leave, it's saved me so much time
Subhuman runs off to Noklateo at the start? Leave
Retarded chink abandons the group to do god knows what? Failed run, can't carry a shitter, leave
Level 12 by the end of night 2? You'll lose to the final boss with a team that shitty
Rev player? A bit excessive, but I'd say you could get away with leaving in this case too!
Why waste you time with plebeians and Fromsoft tourists? It's saved me a lot of headaches