So I was chilling on norms d other day and my team mate picked yas
Nd suddenly everyone was like "u r trash" "y yasuo ??!!" and blah blah
But he was really gud.
Wat I dunt understand is y 
is considered a trash champ
Any thoughts ?? 
wen ur opponet get yas bad cus he hypecarry
wen u get yas still bad cuz he feed
Memory bias... people only remember the good Yasuo on enemy team and the bad ones on their own team. People tend to remember negative experiences better than positive ones. Science.
Yasuo is objectively a bad champion in this meta.
This is not a case of memory bias.
Yasuo has a god like levels 1-3 in some match ups. but everything past that is absolutely sub par at best. meaning if you dont get a lead early or fall behind at all, you get gimped out of early and mid game unless then enemy miss plays and you capitalize hard.
Yasuo has the weakest base stats of any slayer , because his abilities give him so much raw power, but this creates artificial "win conditions" for him to trade. Generally speaking past level 3 ( and even before in plenty of cases ) if yasuo windwall or shield are down, he is likely to lose any trade, meaning yasuo isnt allowed to trade like normal, he has to outplay the enemy, or he loses. so puts the pressure on yasuo to make a play and directly encourages it which results in yasuo giving up early kills.
Despite what bronze and silver thinks, Yasuo has very little escape potential. making ganking him and pressuring him a breeze, add on that his kit makes him auto push waves when he attempts to trade. its very easy to stall waves against yasuo and have your jungler pressure him early.
Even worse, yasuo unless level 6, and has a team comp that supports him, has weak roams in comparison to any meta mid laner this session. slow conditional CC, not mobile unless he can dash. and DPS is worse then burst early game. and even in ideal comps where yasuo can roam effectively, he has trouble doing it because his wave clear is item based rather then ability based. by the time he gets the items he needs to clear, its well past laning. what takes yasuo 2k + gold to do for wave clear, Ahri & ori get by putting 5 points into Q.
In short, Yasuo is a carry laner, but he doesnt get the same support as bot lane carries, making him a feast or famine champion by nature. Any time yasuo is reliable, he becomes abusible. which is why he is repeatedly nerfed to make him even weaker in top lane, which in turn cripples him further. ( that last nerf to his Q hold times REAAALLLY killed him, people who played him because he was FotM probably didnt notice but anyone with 100+ games of yasuo really felt that change)
