He went full LS build, like that isn't surprising in the slightest, of course if you have close to 40-50% LS, you will heal a ton, if you are hitting 600s nonstop, of course that will heal a ton since that is nonstop, extremely fast 300s when he only has a hp pool of like 1700 by max level.
That isn't a norm. Most Yasuos I rarely even see build a LS item, at most they get Maw which only has the LS active when it procs.
That would honestly be no different than if any ADC or heavy AD damage champ bought that much LS. Its countered by simply one shotting him since Yas was squishy. Even if he healed for 100% of his damage dealt it means little if his tiny 1.7k pool was 1 shotted. Hell, there was times I blew a Yasuo up as Morgana even with his passive shield on. Without it he is basically defenseless.
And please don't exaggerate, for a Yasuo or any champ at all to heal a roughly 1.7k health pool in 2 autos or attacks in general with all that LS, they would have to get about 700-900 in healing which means they have to deal about double that to slightly more. Meaning they have to hit for 1400-1800 roughly.....don't exaggerate dude. There is maybe like 4 ults in the ENTIRE GAME that can hit that hard, Viegar ult on an AP heavy champ, pure AP Ekko ult on someone with no MR, and Syndra ult with max balls on someone with no MR, and Garen ult on someone that is the villian that has next to no hp left is basically the only way possible to hit that much. And they are all AP damage.
We get it, you hate Yasuo but don't make crap up lol, just makes you look dumb.
(On a side note, maybe a Max AD Lee Sin ult might hit close to that, but no one in their right mind builds him pure damage, much less max LS, and even then that is a single hit)
Not only yasuo but other some ad champ have wayy too much sustain right now , so ridiculous when mages have to go base when they are low hp .
