It is difficult to be a good DM. Having said that, some are… set on their ways.

I remembered one who was playing a warhammer module (awful system). I played a human with strength 7 (maximum for any character) and we were supposed to travel to somewhere. So my character choosed to sleep in the chariot. Apparently, the module said that since the NPC’s “reached the chariot first and there was no space, we should travel outside”. So that lead to an absurd situation where I was told that even if my character literally slept there and when refused to leave my place for the “noble lady” (with 3 strength), the maid with 4 strength have one of those “critical dice rolls” hidden by the master screen, of course and that, somehow, was better than my own critical role. Of course, I was also expected to protect the rude lady. For some reason. And for free. All the campaign was a rail where no amount of preparation or strategy mattered.

That wasn’t the only “railmaster”. From the ones that ask for a perception check that is pointless even if you have a critical (and you are stolen because he has decided so) to the ones that think that your female character should be rescued so they force the situation, to the ones that enjoy reading long text with their own characters as the real heroes while the players look.

Of course there are plenty of good masters, but for me, the worse are the “rail masters” that would force your characters into their script, no matter your actions or your dice rolls.