the terrible thing about facing illaoi, is that her "counter" depends on your jungler not trolling
i find the "counter" to illaoi is telling my jungler to never gank my lane . and telling him "no bro im serious. im not joking. please friend. never come top. im fine 1v2. i dont want ganks or counterganks. ganking illaoi is bad. its like renekton. ganking illaoi or renekton is always a bad idea"
and hoping he listens and doesnt say "alright bro. camping top" after i nicely ask him to stay out of my lane
as long as my jungler never comes top. i find illaoi is pretty easy to handle . ive double killed illaoi + her jungler trying to gank me many times. i can work around illaoi with my own skill easily
the problem is when my jungler tries to "gank" illaoi. and then illaoi presses R and gets a double kill
no other champion is as bad as illaoi in this regard. its worse than darius. darius you can actually gank. you CANT gank illaoi. if your jungler tries to come top to "gank" your illaoi opponent, then gg the games over at that moment