Sanji literally attacked first and solo without asking for anyone
while Nami and Usopp were even a burden
meanwhile Zolo begs for Gooffy to save him, who is billion times stronger than SH Sanji was with.
couple of kids appear and King of Hell cannot last longer than 5 seconds before begging for rubber God to save him
holding off?
Luffy immediately rushes in from a room next to them as soon as he hears seraphim attacking
That means Zoro couldn't even last longer than 1 attack from Seraphim without getting jobber marks and huffing out his lungs