Hello translator here! I see where you are coming from, but I also wanted to give a little insight into that scene when I was translating it. I didn't interpret him as blaming Yutaka for what the client did to him. He's criticizing Yutaka for causing such a loud scene and getting into a fight over it. Given their yakuza background, I understood the implication more as Yutaka embarrassing himself by making such a public spectacle instead of handling the situation quietly. At least, that's how I understood the original Japanese while translating the scene!
By “quietly,” I meant that Kazunari expects Yutaka to come to him when something like this happens and let him handle it behind the scenes, rather than Yutaka getting into a loud, public confrontation himself. Especially since Yutaka has a tendency to get himself into trouble. There’s also the fact that this club isn’t Kazunari’s territory, it’s under another yakuza group, so Yutaka causing a scene there also affects Kazunari and could create trouble between them and that group. Chapter 2 actually reveals more about this, so I don’t want to spoil too much. So That’s why I didn’t interpret his comment as blaming Yutaka for what the client did, but as criticizing the way Yutaka handled the situation publicly.

dude is overly freaked out, also him being blamed for the creep at his job is hella yikes (I know realistically this is how it would go since host clubs are shady but the brother's kinda giving victim blaming)