No I'd say Oda treats King the worst out of the right hands and by a large gap. King overall has the best feats but he's never shown much love by Oda.
Wank is what Oda did with Katakuri in WCI when he made him a larger threat than a Yonkou and refused to have MC Luffy get a clear win over him. Wank is what Oda does when he draws Marco ragdolling King and Queen together on panel and top tiers run away from him. Oda didn't draw a single panel of King doing anything to Marco. All we see is Marco exhausted with no good panels of King doing anything, while he had Marco sonning King and Queen put together. That's what you call wank.
And the worst of it all was when Oda tossed King to the wolves when he drew Greenbull using him as fertilizer. Forget Marco and Katakuri, I know Doflamingo would never be drawn in that manner. Not even Crocodile. And yet King someone arguably the strongest of the bunch was chewed up and spit out.
He was also called King the background for a reason. Nigh irrelevant only waiting for a 2 chapter fight to lose to Zoro. To make matters worse we don't even know why King lost so fast, it almost seems like Oda just had him throw when he should have outlasted Zoro who could barely fight for a few mins.
So yea overall, King is the most disrespected first mate by far.
King has been called invincible by his opponents
Kata has been called "invincible" by people he is scamming
King was called Right Hand Man by his captain
Katakuri was called Lowly trash by his captain
Katakuri ate shit against Luffy
Luffy ate shit against Kaido
Much much stronger Kaido ate shit against Zoro
Zoro ate shit against King
Idk what wank you are talking about
Katakuri has looked pathetic as fuck