You can't keep relying on Orlumbus or Law to fight your battles for you
Pica was right in front of the plateau, ready to crush the people on it. Did you want Zoro to blitz Pica from a mile away?
Same with Kaido. Luffy was right in front of Kaido's mouth. Did you want Zoro to be faster from long range than Boro Breath from close range?
Also, what about Zoro blitzing Prometheus from long range as Luffy couldn't dodge? Or Law teleporting Luffy away from Kaido's club? It's a team fight after all. They combine their greatest skills.
Also, people are barely able to dodge Zoro's attacks. Most of his opponents were weapon users themselves, who could stall Zoro's swords with their own weapon. Like Kaku using Nitoryu in combination with Tekkai. Or Daz being a weaponized piece of iron. Or Ohm using a sword that shape shifts into long rods and walls. Or Ryuma who was a black blade user. Or Pica who was a walking regenerating mountain. That's the reason Zoro doesn't face bare handed people. Because he will cut them to bits.
And Zoro blitzing Apoo, blitzing Killer with a heavily wounded shoulder and blitzing Prometheus should tell you how fast Zoro is. Or the fact that Hyouzou could react to G2 speed with Luffy admitting he he trouble, while Zoro faced a Hyouzou on steroids and was so fast that he cut his 8 blades
vertically so fast Hyouzou was shocked, then being trashed by Zoro's Blitz.
Also Zoro's endurance is great. Not without reason Nami stated that he is the toughest one. Him fainting after the Killer fight isn't representative. Because we know endurance has a lot to do with will power. For example Luffy being unable to move after Lucci's second Rokuougan, but after Usopp's motivational speech, standing up, enduring a more powerful version (Sai Dai Rin Rokuougan) and not falling down until the job was done. Same with Zoro. He beat Killer - > job's done - > he fainted with a hole in his shoulder while also hungry (Oda laid emphasis on Zoro's growling stomach, he did the same with Luffy when he was waiting for Sanji and his meal).