Meh, imo spoilers only spoil experiences for people who take media too seriously.

When I consider watching a movie, one of the first things I do is read a complete plot summary, including the ending. When I do this and no longer want to watch the movie, in my mind, that’s not a sign that any experience was spoiled, but rather that it just wasn’t very interesting to begin with.

Conversely, I have played Nethack on and off for decades, have read countless spoilers about it, yet still haven’t won and still find it interesting.