It's how it is. By far the worst offender has become this questionable notion that Luffy surpassing a Yonko will be overshadowed by his subordinate doing it instead.
Like don't get me wrong, I entirely expect Zoro to cut Kaido at a significant moment. Thats been set up. Hell, I can see him do it at a point to prevent Kaido from crushing the capital with Onigashima. What I truly don't see is this him being a persistent factor after and overshadow Luffy.
If Zoro cuts Kaido, something WILL force Luffy to get the remainder and main bulk of the fight. People forget that this is EXACTLY what happened with Doflamingo and Law.
I strictly recall Law fans being super toxic and gung-ho about him and Luffy defeating Doflamingo "equally" because Luffy needed help and Doffy was just that strong. Que Law losing, saved by Luffy, and Luffy having a further 10 chapter fight with Doflamingo. I will never forget this. People are expecting the same thing from Zoro, only now it's far worse because its Kaido and Kaido has always been a feat Luffy needs to surpass, not Zoro.
Tldr: I expect great things from Zoro, just not the crazy hot take levels like half this forum seemingly has indoctrinated themselves into thinking. Guaranteed that when ZKK doesn't happen, something that has zero foreshadowing outside of an arbitrary comparison to Ryuuma, "Odas a hack writer" and "What a shit manga" will be on the front pages from weeks. Like guys, ZORO ALREADY DISPLAYED THE FEAT AT PUNK HAZARD TO THE SAME WESTERN TYPE DRAGON, nothing at all implies he's going to do it to a real, conscious pirate with a totally different appearance and comparative standpoint