Yonkous being much stronger than admirals isn't a fan thing. It's the premise of one piece. Admirals are the strongest of the marines. The knights are the strongest warriors of the WG. The yonkou are the strongest rulers of the sea.
They are literally competing to become rulers of the grandline where the other 2 reside.
To say such rubbish in 2023 is just amusing. The WG rules the world, and the Admirals are the strongest fighting force of the WG. Even as recently as a couple of arcs ago we had a Warlord state that the Navy reigns on the seas, not the Yonko or any other faction.
The only thing the actual manga provides is that the Admirals and Yonko are at the top of the world. Not a single time is one group placed over the other, even by the main character himself who treats them interchangeably.
It’s not simply a fan thing, it’s a “fans with poor reading comprehension” thing…and in a manga for youths no less.
It’s 2023, grow up and read with eyes wide open.