Red Flags for DMs?

[Rhyltran]

Care to share the story?

DM who had no clue what he was doing. "You find a treasure horde after slaying the dragon." "The treasure turns into a swarm of roaches! They.. also attack!" "You find a magic sword." We try to figure out what it is. "Your roll of 39 tells you that it's safe." Fighter picks it up. "IT'S CURSED!" Yeah.. If we did get something and somehow it didn't turn on us, poof from existence, explode (these all happened), despite whatever alarms, system, or anything we put in place it's stolen. When we literally had every conceivable way to ensure that no one takes our stuff "A deity did it." That was the walking away point. I wanted to walk much much sooner. Friends convinced me to stay.

Oh, and half the list I posted above are all things that were in the campaign. Critical fumbles were also a thing. The entire adventure felt like a monty python skit.