I'm starting to notice something regarding the Farmers (the two of them we've met, that is): both Marigold and her father, whenever they experience confusion or panic, immediately revert to a specific emotion to try to "protect themselves", so to speak. Marigold's supplantive emotion is self-loathing, and her father's supplantive emotion is anger.
Observe that both times we've heard from Mr. Farmer ("explain steampunk" and the phone call) he was angry for seemingly no reason. I posit that he supplanted his confusion or panic at a situation with anger at the fact that he is confused or panicking.
Likewise, Marigold has been put in countless situations in this comic that caused her to become confused or panicky, and nearly every time she immediately says something self-deprecating and actually seems to believe it! She tries to escape her situation by telling herself that she is bad and unworthy for feeling the way she does.
Both of them turn on themselves at the first sign of perceived "weakness" within their own emotional state, regardless of whether such perceptions are accurate or not.
Why this would be the case for both of them is a whole separate question, but I think there's a lot of evidence for this core idea.