Maybe guinsoos/devourer arent the problem...
Maybe its that there are no good items that counter them. When high dps champions make those items, frozen heart hardly puts a dent in they're attack speed. Same with omen. And they arent using crit so omens damage reducition is useless. Thornmail is only good if your stacking other AD items, and even then it wont reflect much because so much incoming damage is magic from onhit that even IF you were stacking armor items its hardly marginally effective, while also requiring magic resist items to negate the onhit.
And then on top of this they just run warlords for free ( WAY TO MUCH) Free life steal. Like up to 20%? That keystone is worth like 1k in gold or more. So even if i build all these defensive items, i will lack the damage to duel someone with guinsoos/devourer because they will just out heal me because i had to buy nothing but defense.
And even then it does ALOT of damage. Personally when i see a Yi or other AA based sated
will have my teams back. TO THE SAFETY ZONE!