They're definitely setting her up for disappointment there, but I'm not sure what to make of her obsession in the context of self-awareness and free will. Of course, many humans make the error of obsessing over an imaginary relationship.
I'm actually surprised that they ended up getting to that as quickly as they did. There definitely was disappointment as it dawned on her that things were not as she remembered them. That host playing the mother for instance, likely a new host replacing the role she once had? Interesting how far out of the way that location was. Initially, when we got our first glance of the property, I thought it looked like it could have been an abandoned part of the park as there wasn't much of anything surrounding it.
The deeper we get into the season, the more exasperated I become in regards to people's insistence that the show is becoming more complicated, and the reason I get more and more exasperated is that there really isn't all that much for people to be confused by.
It's a matter of perspective though. Maybe you have an easy time to follow it, but you really can't fault people for having trouble following a show that has at least 5 different timelines.