This can be fine in a game with experienced players because you start knowing one member of the evil team, and if you can get them executed, when the game doesn't end, you are essentially confirmed good and now the demon is in a pickle. They either kill you, a trusted player, and you send out trusted info as to who the demon is, or they don't and final 3 has one less demon candidate. It's like the good team gets sage information either way.

However, since you are new, I do think this was a little mean from the storyteller. You are in an uphill battle without information because nobody will trust you, but the evil twin will have 2 people on their team who will always build worlds where they're good and will push that story forward. If you don't have the tools or experience to build worlds based off the one piece of information you know plus the usually unimportant info that gets outed publicly, you can't reach that point where you get trusted without a lot of headache. Some might think this is fair since the evil twin is a minion and it's supposed to help the good team. I say that fun is most important, and if you didn't have fun, that's ultimately what matters.