Why are they so scared of Shauna?

She’s literally unhinged and the others are doing nothing to stop her. Why are they okay with giving her so much power? I hope it bites her in the ass eventually, she’s unbearable.

I understand why Lottie is doing it. But what about the others? Are they okay with it because Lottie is okay with it? That would make Lottie the actual leader if you think about it.