Its all part of agendas.
Sanji is constantly compared to his Germa siblings by the fanbase AND plot, so them beating Katakuri is indirectly fueling the Sanji > Commanders debate
On the other hand, King is constantly compared to Katakuri by the fanbase, of whom the Zoro fans want the former to be better to justify their fav winning against him and thus automatically being above Kata too.
In Zorotards brain, he is already beyond Sanji, so any feat he and his siblings do will always be below Zoro. “Oh sanji/germa beat kat? Smh zoro can low diff him then”
There’s no escaping it. Both sides here want Kata to go down to fuel their dumb powerscaling debates.