I don’t see projection in Bubbles as she has different issues. In her case, she lost her platoon and seems to feel guilty. I don’t know how much of the description of missing memories there is but she seems to feel responsible for the deaths. We don’t know how much of that through action, inaction or simply being overwhelmed. Whatever happened, we don’t know how much is related to survivors guilt and how much is due to how much is in the detail. Furthermore, in her attempt to deal with the trauma she underwent an operation that led to the loss of said memories. In her mind that loss is another betrayal of her squad.
Add to that the fact that there have been people who have accused her of being a danger, her guilt and fear of herself took off. Corpse Witch exploited her anxieties to control her.
I can't speak for BenRG, but I can tell you why I think he's onto something.
When Faye first tried to get Bubbles to come out of her shell, Bubbles ended up physically assaulting Marten and Pintsize, and taking a swing near Faye's head that ended up putting a hole in a wall. When she got back to her cave, she destroyed a bunch of punching bags while calling herself stupid.
When a group of teenagers mocked her, she violently and angrily went into isolation, yelled at Faye to get out, and then called herself weak and expressed irritation at Faye for presuming to understand.
Quite recently, she got angry at Faye, saying "Why are you smirking? Have I made a fool of myself already?"
Just hours ago in-universe, Bubbles made it clear she identifies as being
different.
In short, Bubbles is self loathing and prone to isolation. This is the behavior of a person who is heavily invested in thinking of herself as a freak. For such people, the thought of change can be
more scary than the pain of being a freak, not only because that pain is a known quantity, but because their ideation surrounding that pain has come to define them. They have embraced the mantle of the freak, and they will defend that image of themselves.
I did this for around thirty-five years, so I know what I'm talking about. It wasn't until I was in my forties that I was able to see what I'd been doing to myself--how I had cultivated my own freakishness. Seeing it was only the beginning. Seven years later, I'm still working to change it.
The reasons why I got to a place of isolation, self-loathing and identifying as a freak are nothing like Bubbles's. But the point is, she got there too. And anyone who gets there digs in and defends it. That's why it resonated with me when BenRG said she might be projecting. Given all of her own self-loathing, and all of her violent attempts to remain isolated, I think he has a point.