Funny, I find it the other way around - I find Darius to be absolute dogshit compared to S5/S6. Now they die so quickly, and everyone and their mother has dashes, slows, speed-ups, shields and/or knock-ups.
If you die to a Garen, you fucked up. He's such a simple champion, and while easy to play, his threat is also easy to assess.
Darius is squishy af, and can't go into the thick of it anymore, unless super ahead.
But I'll agree that Jax, Irelia and to some extent Camille and Riven had a free season (Urgot too, but he's really not your typical bruiser), mainly due to them being mobile bruisers - while still not being weak in laning. Riven at 6 with old conq up and ignite could flat out burst a Darius with a phage down, 100-0.
Same with Jax. And while Darius have the early game advantage in most cases, he holds none of the agency. Those 4 champions chose when to fight, unless THEY misplay.
It's really disgustingly simple on Jax - Darius uses/used Q? Jump in on him, AA-W-AA+start E, and just fucking hunt him down, or make him unable to trade anymore...
Yorick is disgustingly strong vs immobile people though, due to that W. ;)