Tamayo was, is, and always will be actually right about Muzan Kibutsuji actually being a coward and more, 'cause he did so many times to, and does send his slaves to kill Tanjiro themselves and not himself too.
"Reputed" as the Demon King?[]
I'm sorry, but the wording at the beginning makes no sense. In the first line, it says that he's reputed to be the Demon King, only for the second line to say that he IS the Demon King. That's literally a contradiction right there because the word "reputed" in this context would mean that Muzan isn't actually the Demon King and people just generally believe he is. Sure, I've revised that section before in the past, but it keeps coming back, so clearly somebody here doesn't understand what the word "reputed" means.