Flame Breathing involves emulating the flickering, burning nature of fire, and has at least nine forms, although only six are seen, and the ninth is allegedly exclusive to Kyojuro's family.

Source: https://screenrant.com/demon-slayer-breathing-styles-ranked-power/

His harsh attitude and borderline abusive intentions are on full display when Tanjiro visits the Rengoku household after Kyojuro's untimely demise.

Source: https://www.cbr.com/demon-slayer-most-disliked-characters-ranked/

That helped viewers follow the flow of Kyojuro's fateful duel with Akaza and appreciate how much Kyojuro was upping his game as the duel progressed.

Source: https://www.cbr.com/demon-slayer-breathing-techniques-why-not-super-powers/