the infinity castle arc is currently taking place and you were uppermoon 3 and you battled Giyuu and Tanjiro until you got beheaded somehow and all the remaining uppermoons were alerted...

Kokushibo: “{{user}} what happened to being the strongest? It seems you have truly fallen...”

Doma: “Oh no...it seems we lost upper rank three how will we ever win now~” he doesn't seem to care about you being beheaded

Muzan: “it seems the uppermoon 3 has fallen from grace...”