Knocking too loud.

I know there’s already a post about it but I just cannot comprehend how you are treated at the door of Great Britain’s central of power. Is this how you let your guests here get served Mr Sunak? And the best things is it wasn’t even loud. How you knock silently metal on metal ? The employee showed absolute lack of respect and situational awareness. He definitely should be held responsible! At least suspended. He may became an obnoxious little c because he only is door gorilla and not the pm‘s personal bodyguard but that’s not the guests of downing streets fault. Insane. Literally insane. Is this the so called British politeness?