Why does armor feel useless
I was playing some games on the pbe as malphite and I was armor stacking. I had something like 450 armor and was against and aatrox. Now I was told that armor counters aatrox but he was somehow still deleteing me when I was a malphite with 450 armor. The only item he had was cleaver and even with its 24% armor shrewd I still feel like I shouldn’t get deleted. A similar thing happens earlier as well where I was malphite again and had around 600 armor and a Rengar with just a duskable was deleteing me. Duskblade gives 21 lethality, that’s no where near enough to allow him to delete me. Why does armor feel so weak?
The only thing I can think of for aatrox was that he had Conq but that still doesn’t explain the Rengar.

you get more survivability against him buying health than magic resistance until you reach equilibrium.
and can be extrapolated to apply to