Gotta be more to this than just leaving a bad review online. She might have a legal case in civil court maybe? The hotel probably has guidelines/ protocols when to have a guest removed. Writing a bad online review is probably not one of them.
Here in my area most state have what is called Innkeepers Law, you can remove someone for any disturbance or anything that disrupts anyone’s stay and you do not have to refund anything...
Many years ago I learned the hard way, some people’s actions never “make sense” to a rational mind.
There are people who will do crazy and stupid for no reason we can ever understand.
Because It is in their own twisted minds they were motivated.