Illaoi is frustrating as a champion
You either shit stomp her if youre ranged with her having 0 chance of victory or she dunks you because you can only fight her in melee range.
She either destroys you in ganks because you and your jungler cant kite due to your kits, or she gets ccd to hell and back while having no chance of fighting back.
And of course she can be spotted through fog of war because fuck Illaoi.
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got close to me? ult them and remove them from the teamfight."
gets atleast nine hits off of her tentacles (with 4+ tentacles and 3+ casts of W, it doesn't seem unlikely) it deals over 1000% of her AD, from tentacles alone

so that isn't a reason she is balanced and do you like battling
farms for so damn long
get countered by CC? NO! because any cc that he receives is CC not being used on a damage dealing ally. CC just lets him get cooldowns back.
of top lane. Get used to thinking about things other than her and you'll make it through.
Rapes the living shit out of her...
They think she's OP... And she is...
Just waiting for my main to get dumpstered... 
Q does more dmg than she heals, and the tentacles give you bonus hp.