Yasuo Help Pls

Yeah, you probably need to learn how to play melee assassins in mid then.

Try getting a friend and setting up a custom game between your Yasuo and them playing something with flashy and obvious projectile abilities, like say Ahri, and 1v1 each other. Then, do this exactly as I tell you:

• Yasuo is not allowed to build anything
• Ahri is allowed to build whatever she wants, preferably the mana sustain so she can harass you all she wants and the raw damage to kill you whenever she feels like it
• Your top goal as Yasuo is to not die. Ahri's top goal is to kill you. If you die, you lose.
• Your second goal as Yasuo is to get more CS than Ahri, and vice versa. If you succeeded to not die, but she still out farmed you, you still lose.
• Your third goal is to tap Ahri as much as possible without dying. Hit her with your tornados, time your dashes, maybe even squeeze in auto attacks. These are your bonus points.

Everything about this is going to teach you how to play Yasuo "correctly".

1. Because you are not building items, you will do no damage and be extremely squishy, making you very easy to kill. This means if you make dumb mistakes, Ahri can easily punish you for it. So, this is your first goal. Don't die. Your tools in this situation is to Wind Wall her combos, use your passive to mitigate poke, and make sure you are standing behind minions to avoid certain abilities (in this case, Charm).
2. Of course, you could just stand under your turret the entire time, or even at base, and be safe. Your second goal is to out farm Ahri. Because you are not building damage, it will very quickly become extremely hard to consistently farm your minions. This will teach you how to time your last hits perfectly, and hopefully will give you good context about how to farm early on if you ever played a real game (don't just spam your Q, be smart about how you farm).
3. Finally, knowing when Ahri is at her weakest. If you can perfectly aim your tornadoes, that's good. Take that skill to a real game and you will always be able to get that perfect ultimate. The world of melee assassins is not just clipping your opponents with long range skill shots though, you actually need to know when you should get into melee range so you can hit Ahri yourself. My personal tip to help you learn how to do this: Abuse Ahri's cool downs. If she misses her charm or you Windwall it, that means for at least a few seconds, you are guaranteed safety from getting hit by her Charm. This is your opportunity to go right up to her, auto her, then run away without being pulled and destroyed by her charm. That was just an example by the way, and you still have to worry about her Orb, but if you can learn to abuse these openings in the opponent's champion, this is how you win Mid Lane as a melee champion. If you can bring this skill of abusing Cool Downs into a real game, especially with Yasuo of all champions, I can guarantee you that you will learn how to win the lane matchup almost 100% of the time (hyperbole, but I am serious that this is a strong tip).

Do this exercise as long as you feel like it. I personally recommend about 15 minutes or so, maybe less maybe more, but ehh. At the end of the day though, you need to learn how to use Yasuo's defensive strengths, learn how to farm correctly, and learn how to abuse weaknesses.