Is Gnar's Kit overloaded?

Yes, it is

And his W is very overpowered, I guess Riot thought base+14% max hp was balanced on a champion with very high attack speed.

IMO, just a little but.

Yeah and his stats are ridiculous. but is a complete non-factor and a waste of a slot outside of like.... D1+

You can farm that character all day because he doesn't actually get to control his kit like Nid/Jayce/Elise. You have to pick yourself into a loss to lose against him in lane when really high skill levels aren't involved.

The only problem with gnar is the stupid kill potential he has in mini gnar if fed, i usually don't even transform when ahead of the laner and just kite and pursue like a retard, perma slow and ms boost ftw. They should nerf mini gnar W and buff mega gnar E.

Bork + w shreds 100% hp in like 7 auto attacks. It's really annoying.

I think his hop should be slowed down a little bit, it's almost identical to playful trickster in that you can't target him because its too quick.