Ok I'm pretty sure you didn't read or watched op carefully you probably only watched the fight without context

Bruh did you even watch One Piece .

He even got the tag wrong

It's return to sabaody arc not sabaody archipelago arc

@Yımorta Kuma also saved them at Sabaody Archipelago and he confessed it to Rayleigh.

Yeah but still

Kuma saved them because he believes in Luffy and he saw what good of a captain he is. It wasn´t about battle strenghts or anything like that.