Fushimi’s little meltdown in episode 13 is so unintentionally funny because it’s triggered by Yata taking his eyes off of him for a single second to look at Shiro’s freakish looking sword of Damocles. It’s just like:
Yata, looking at what is essentially a giant ass rapier in the sky: What the fuck is that shit???
Fushimi, very upset and offended that his most important person in the entire world nemesis isn’t paying attention to him: I’m your opponent, remember!