That sucks man. I haven't seen them thankfully but how much of the game would you say was spoiled for you?. Is it possible that there is a lot more of the game that you don't know about?.
It was just a basic synopsis. Like, 10 points of the story and that's it. However, each of those points are presumably the key moments in the game from what is sounds like.
The story synopsis is very short and so it's easy to get spoiled.
Previously, we were saying that it was fake since he left out a few characters entirely, as well a a few other events that we knew about from interviews.
EDIT: For those who haven't seen the spoilers, I'm not saying it's good or bad. It can be either one really, so there's no reason for this to be a downer. It's all down to the execution. You can make a synopsis for any story and make it sound terrible. For me though, I'm always going to look for those key moments in the story now that I know about them when I play the game, and that's a situation you never want to be in.