No matter when you joined the internet, if you're reading this in 2018, you've probably had something spoiled for you. It may have been a game you never intended to check out in the first place, or one you were hyping up for months only to be ruined by some anonymous user in some comments section from a far flung website, but either way it sucks, since no one wants a story spoiled for them before they've had the chance to experience it.
Sadly, however, spoiling things for others seems to be the internet's new favourite pastime, with countless films, games and TV shows all having had their biggest moments cropped and superimposed on completely unrelated forums, videos, and comments sections for unsuspecting browsers to fall victim to. It's unfortunate, but there isn't really anything that can be done to combat the problem apart from abandoning the internet altogether.
Literature has always been spoilable in one sentence. It may be more difficult for titles that follow a non-linear narrative (like Fallout or Skyrim for instance), but all it takes is one line for someone to completely ruin a main twist or ending, and in turn the journey it takes to get there. It doesn't even matter if a game is brand new - the new rule seems to be "If you haven't got around to playing it immediately, it's your own fault", and that's just plain wrong.
Ironically, the only way to address this stuff is to deal in spoilers, so there'll be plenty of them from here on in.