I'm a really really new player. Is it good etiquette for a DM to get upset that you're killing or beating their encounter?
A guy said he would DM for us in a one-shot. Before we ever started he kept saying and laughing how we are all going to die. Then we actually beat the first encounter and he was visibly upset (we wasn't supposed to).
So he had 2 beholders come flying at us before we could get our heads together and started another encounter after that, because we won AGAIN barely.
He said we got teleported to an enclosed cave full of gold and a black dragon was waiting for us. I actually 1 shotted the dragon with a quivering palm. He says"and out of no where another black dragon flies in" - it was an enclosed cave.
After a few turns our paladin wins with geas and commands it to sleep for 30 days. Then a third one comes in. It was getting too ridiculous and to be honest was not fun after I realized that he didn't plan ANYTHING after the first encounter because he was supposed to kill us and literally just made up everything after the first encounter.
Is this what I should expect from all DMs?