As yasuo, Improper usage of his W can get him killed in the lane. This is especially true against ranged matchups. The alternative is to back off, which allows the enemy to just zone Yasuo off the wave.

Very vulnerable to crowd control as it prevents him from casting his E for a while. He can’t cast E on the same target twice, so he can easily be caught out.

Although a power house, he is very squishy and can easily be burst down if he happens to mis-step. This can happen quite a lot if he is pushing the sidelanes, and overextends. As yasuo, The incorrect use of his W can cause him to kill in the way. This is especially true against various matchups. The alternative is to step back, which allows the enemy of just Yasuo area of the wave. Very vulnerable to crowd control because it prevents him from throwing his E for a while. He can't throw E on the same target twice, so he can easily be taken out.