Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
I am a gold elo yasuo player, I have over 200+ games and he's by far my favorite champion. No, I'm not some god tier player who wins every match-up but currently with this build even if I get behind so far I've been able to come back late game and win. Most match-ups are fairly easy especially if you first blood your opponent, even against tanks since Yasuo's Ult gives armor pen.