Yep, looking at it retroactively, I thought he wasn't done dirty but now with Imu taking Gunko over, it doesn't look as good anymore.
Just the Sanji effect, I guess.
Just the Sanji effect, I guess.

Take out a HK - He regens the very nexr chapter
Show ACoC and FS - But isnt fast enough to save his son
Surrenders and gets taken out by base Gunko
Broggy runs and grabs Imunko
It is not that the others are better/have better feats (Broggy being faster etc.), it is that Oda seemingly didnt care how it would reflect on Gaban. Of course we can theorize that Imunko loses access to Gunkos powers and her speed arrows and hence she got grabbed by Broggy or Imunko let herself get grabbed as it was her plan or shit.