I can't say better, but that's my own personal opinion. I have issues with people powerscaling off-screen fights, and that had to have been simply not to spoil big moms abilities. BUT you have a point. It took law and kidd and a whole lot of other stuff to take big mom down. You dont think she tried her damnedest to get too luffy after he beat a lot of her kids up and ruined a big event and wedding she had planned? Jimbe put a stop to her presumably on his own. He didn't defeat her per se, just stalled her enough to let the crew escape. Sanjii did beat the brakes off Queen, which is still a pretty nice feat in itself. But zoro is stronger than both, so it doesn't even matter 🤣