Does anybody actually think this is fine??

Look at the true damage.

1781 magic damage. 572 True damage.

They have 3 mountain drakes.

His passive is doing 1020
160 base + 50%AP, doubled to structures.

Lichbane is doing 430 80(from base AD) and 350 (from AP)

Keep in mind, towers only have 40MR.

He has a Void Staff, Sorc Boots, talents and runes bringing it near 0.

The damage can be explained easily. This champ is designed to take down turrets quickly. Full build Tristana can kill them just as fast with her E.

I have no reasonable explanation as for where all that turret damage is coming from. Let me try to figure this out... Ziggs' passive deals double damage to turrets, though I'm not sure how much damage it deals in the first place and it's not on his page. Lich Bane does 75% base AD + 50% AP, so there's probably somewhere around 80 + 350 = 430 damage coming in there. There's also the fact that turret damage is whichever would deal more, either 100% AD or I think it's 40% AP, so that's another like 300-ish damage there for 730. That means that the rest of the damage to the turret from that 1 auto has to be coming from his passive, which it is dealing a lot of damage if it's chunking that turret from 3,300 to, what is that, 1500? Yeah, that probably needs a nerf.