The comedy gold in this eps was Glenn having a Magical Girl sequence as he activated his Trap Card.

As for Sisti being weak and breaking too early, that was the point of the rape-guy's speech. Girls like Sisti who are loud and brash (like anime tsuderes almost always are) are always weak on the inside, and girls who seem weaker-willed, like Rumia, are the ones who are actually as strong internally as the loud ones pretend to be.

I found it very refreshing that the series not only acknowledged the trope, they immediately called it out in only the second episode directly in the dialogue using a minor character. Skipping the bullshit entirely and just admitting the two female leads true personalities.