That's equally an L for boa since you stated that she would defeat coby. If she didn't fight him and was instead capture by bb before the two even fought that means she didn't defeat coby. Which means boa fans claiming she would clap coby are also wrong lol
If coby doesn't even get a chance to even have a clash with Boa after he goes to Amazon lily, that's a huge fucking L man. That means either oda thinks coby can't do jack shit to her, or it means coby ain't that important in the grand scheme of things.