Has there ever been a bigger plot device than this shit?

OH MY SEVEN QUIRKS

Care to explain what's dumb/flawed with the idea other than that it's not directly stated? It's definitely a headcanon, reasonably explained though.

Oda really missed the mark with Doffy. He came off as comically powerful in place of being any sort of meaningfully manipulative and resourceful. He really didn't need to be capable of slowly annihilating a city to be a sizable threat, and it only made him less interesting.

Doffy as a whole is a mess yet people just love it because his deisng.

I can see where you're coming from but I actually liked the subversion of him seemingly being just a sneaky guy who just uses others to do his work but in actuality he's tough as nails.

Doffy is the most compelling villain in the entire series

The bomb in Alabasta, the gas in Punk Hazard, Noah in Fishman Island, the sun is Thriller Park, Aqua Laguna in Water 7, the Buster Call in Enies Lobby, the giant thundercloud in Skypiea, etc. it's all the same.
And we are yet again on an island with a despotic and cartoonishly evil ruler and a disgraced royal bloodline, pretty princess and some problem, this time it's food, it was water in Alabasta, shadows in Thriller Bark, racial tensions in Fishman Island, you know where I'm going with this, it's how Oda likes to write his stories. Of course we are sick of it, how could you not after reading OP for more than a decade, but that's the way things are.
Personally I just want it to end.

the biscuit hammer from the lucifer and biscuit hammer was bigger.

That doesn't make him well written.

Nanika from Hunter X Hunter