Irelia honestly needs less sustain or less tank stats.
Irelia is a champion that soaks tons of damage and sustains all that damage back up. Im not even going to talk about her stun or true damage. With Flask she is the jack of all trades, unbeatable sustain and tank. Shes worth the ban at her current state, destroying everyone she fights in the top lane.
that will hard counter it, and maybe
to deal damage while she's in melee range to stun you that will also deal damage as she tries to use her W?
or something to further hurt your laning.