I can't find the game on your op.gg but I'll assume you are the Shyvana
Look at your build. You built the full jungle item PLUS a machete, which only builds into another jungle item. https://imgur.com/a/RF8UN
This goes to show you probably not know a lot about the game, such as other things like how to counter Yasuo effectively. In addition to all of that, look at the rest of your team. No support, only 2 players use flash (I could see the argument for ignite Shyvana but it still doesn't excuse no flash on garen or no flash on quinn).
Even if it's due to the level requirement, your MMR is so low any half-decent Yasuo player can pubstomp because it's where he excels at, outplaying people who have not a clue what he actually does.