For me, I would put it in the episode when Akko gets the Red team in trouble (Don't remember which ep was it). More specifically, I would put it when Lotte was ranting about how great Nightfall is. At the end of it, she's going to be like:
"But I can't fucking go because you screw the pooch, yo" I would DIE right there and then.
Anyway, comment below on where you'll put the one F-bomb at!