To be honest with you, you're no any different with that sort of attitude.
Regarding the matter at hand though, I wanna start off by saying, Yasuo is pretty much in a okay position right now. The only reason why Riot are looking to rework him sometime soon is because of the encouragement from particular players. People just get upset about the fact that, whenever they're playing a game where they have a Yasuo mirror match-up, they get upset because usually the enemy team has the better Yasuo whereas they have the trashy one. Just because a player is super good at a champion doesn't mean that specific champion is busted or whatever. But no, a lot of people would think otherwise because they simply don't even know how to outplay/play against a Yasuo.
I'm not defending that champion because I'm a Yasuo main. I'm just telling you how it is.
Just like every other champion, Yasuo has counters too. I've honestly lost count as to how many times I've said this to people (especially Yasuo haters). Champions counters include the following; 
. Item counters include the following; 
and I'm pretty sure 
as well.
Legit, a Bronze 5 player could play over 1000 ranked games on Yasuo and still not be able to climb out. That's just the player. But then you also have well-known Diamond 1 one-trick Yasuo players such as Moe (otherwise known as Yassuo) who usually get really good KDAs but usually just don't get a victory at the end. So just because you get a good KDA on a champion like Yasuo but you don't get a victory at the end, yknow, you just need to get better on that champion and improve your mechanics. It doesn't mean that Yasuo is busted or anything.
If Yasuo was LEGITIMATELY busted, his winrate if anything would be a concern but it isn't.
Last but not least, I don't know if it's the fact that you had a really lucky game with Yasuo since it was your "first" game with him that made you feel Yasuo is completely strong or whatever OR the fact that you genuinely hate Yasuo and you just made up this scenario so that you could beg for unnecessary nerfs because of your hatred towards that champion. I don't know. All I'm just saying is, you are of course entitled to have an opinion and such so, however, rather than just assuming a champion is completely strong in whatever part of a game (whether it's the laning phase or whatever) without being able to provide any solid evidence or statistics or even anything along those lines, just try and play more games with Yasuo and see if you can pick up some more pros and cons of Yasuo to back up your statement. Because if you're just going to base a statement off of one lucky game, some people will just casually disagree with you and think otherwise. It is up to you to prove them wrong honestly.
