Jinbe is a Shichibukai, of course he can handle some Executive
Robin & Brook are Teaming Up, it's not 1 v 1
And Franky built Super Strong Robot just so he can have such Fights
Sanji is fighting an Injured Jack & Scabbards might give him little help so he can win Faster
Nami & Usopp are against Page One & Ulti who are obviously Stronger but the Duo might Outsmart them or receive Help
So Yes, Straw Hats were given Favorable Fights just so that they keep their Energy for another Fight
Also notice how King & Queen aren't in a Serious Fight & are obviously left for after Flying Six are Defeated
Not to mention that Luffy lost his Gear 4 & Zoro is busy protecting him
All of this clearly shows us that what we are seeing right now is "Round 01" where Kaido/BM Win while Jack & Flying Six Lose
Then we will have "Round 02" where Straw Hats fight Big Mom, King & Queen follow them to the Roof & they fight Kid & Killer
While Luffy & Zoro have their Rematch against Kaido, but this time they Go All Out & there isn't BM to bother them
Marco & Drake & Rest will handle the rest of Fight below, especially with CP-0 being there, Apoo returned, More Numbers incoming & who knows, maybe Big Mom Pirates will show up too