I agree. Even as an Irelia player, I find it stupid to fight him. He can build straight tank, and it's hard to stick on him because of his Stupid disengage capabilities. Once you're engage is finished, he can turn around and kite you to death, (literally, with the Boomerang permaslow, and movement speed buff as a result of hyper). It's basically that you can't fight him in Mini Form because Kite to death andn super self peel, and you DEFINITELY can't fight him in Mega form because of how many free tankyk stats/ CC he gets.
Also, (and this is less so of a complaint) why can gnar do %Max HP magic damage? On Champs like Shyvanna who have no CC, is Melee, and has to land a skillshot to get the equivalent effect, a mechanic like this makes sense.
On Gnar, this does not make sense at all .-.