My problem with Darius is his huge teamfight presence, above everything else in that list.
If you focus Darius, he's very hard to kill, and by the time he dies, his carries have killed or nearly killed yours. You lose the teamfight.
If you ignore Darius, you kill his carries, but he gets to go on an R mashing spree. You lose the teamfight.
I don't like Jax much either... everything else on that list is tough, but they often make a trade-off for damage or durability. Darius doesn't have to make that trade-off. Tryndamere doesn't belong on that list... at all.
That's not to say I haven't beat him, but I'm only one of three on my team. If I out-range Darius, I can handily take him down (I had fun tearing him to pieces with Kog'Maw). If anyone tries to melee exchange with Darius, they pretty much always lose the trade.