I guess it's the actress I find unlikable...
Sarah Wayne Callie's plays the exact annoying, nagging, arrogant character she played on The Walking Dead. I'm guessing that's simply her true personality and she just can't act.
As for the character, while I see this camp for what it is, who is she to come in and start making demands? Gauntlet or not, she didn't earn any seat at any table. If she doesn't like following orders from a nut job leader, then she needs to leave. When you're in someone else's house, normal or not, you shut up and follow their rules, or get out.
They picked a perfect actor for her son Bram. He's just as obnoxious and annoying.