What are some stories about the worst GM that you have had?

The following is not quite about bad GMs, but about missed opportunities.

A few years back, I played in a very interesting variation on Star Wars. In this setting, Anakin Skywalker had managed to not become a thrall of Palpatine, and had eventually managed to overthrow him. Luke and Leia were his main ministers, and the Empire, while ruthless, didn't blow up planets for fun, only in case of medical emergencies.

The background was very good. We were told to create high-ranking personalities of the Empire, so we had a Grand Admiral, the Great Moff, the Boss of the Dark Sun, the magnate who single-handedly controlled most of the large companies in the Empire, the Hand of the Emperor, the Head of the Jedi Inquisition (don't ask), the foremost expert on Jedi lore. Plenty of character background to play with, everybody had secrets, plots-within-plots, and secret weapons/blackmail material/death squads/scapegoats/... We were ready for a galactic Soap Opera.

And then, our characters never got a chance to interact with each other. We vaguely met at a ball, and during a railroaded adventure on Yavin IV, but that's it. Almost all of the time, each of our characters was sitting in his/her office, dictating instructions to our assistants, and watching the results of our plots from afar. And since our objectives were so orthogonal to each other, said instructions remained basically invisible from other PCs.

That's basically because the two GMs were new at this, much less experienced than some of the players, but this was a shame, as both the setting and the PCs were great.

Oh, actually, we had an interaction: my PC#1 was accidentally one-shotted by a conversation between two other PCs, which fell into the wrong ears.

/r/rpg Thread