Yorick if played well definitely has the upper hand. Garen is far squishier now, with a less useful passive as well. Yorick, especially post 6 and post sheen can stomp all over Garen in 1 vs 1s. In fact, statistically Yorick is his hardest counter, with a 6.8% winrate delta over the Garen.
Morde also dumpsters him nearly as hard with almost a 6% winrate delta.
Darius also still counters him, (4.5% winrate delta) Urgot destroys him, hell, Sion, Illaoi, Camille, all the ranged top laners (Teemo, Kennen, Quinn, Vayne, Vlad, hell, even top lane Kai'sa beats him) Ornn, Pantheon, even Rumble has a positive winrate.
People acting like he's super OP (with his barely over 50% winrate plat+, 50.6% according to League of Graph, and 50.7 according to Champion.gg) and deletes anything in melee, yet he has oodles of counter play available to literally every single champion in the game, and loses a massive amount of top lane match ups, including to at least 10 different melees, and virtually every ranged top laner.