I've been studying Gura for a while and here's what's going on.
Gura entered into Hololive and thought people would enjoy her as a vtuber and not the "ha ha funny shark does something stupid", which she said that line over and over.
She'll pretend and say that she doesn't care when she's clearly lying. Just like the others said. She literally dropped the Ringfit over one clip that made her feel uncomfortable.
I believe that she doesn't like to be made as the butt of the joke, especially with the flat jokes, being stupid and even the lewd stuff. She'll play it off in character but deep down, she doesn't like this.
There's also stuff going in her personal life where she feels doomed and nothing matters. Maybe issues with her ADHD, which does cause low self-esteem, troubled relationships, and difficulty at work. I believe she wants a relationship but can't because of having ADHD. She hinted this from time to time but it was big during her valentine times day stream. She doesn't like the fact that she's alone and sometimes even hates her life.
I'll even say that there are moments where she wants her viewers to see her real self, which is kinda depressing. For example, when a viewer said "everything is fake", she could've said something cheerful but she said "Nothing is real" and read about "being monkeys on a small rock", that itself is rather depressing to tell people. Yet deep down, those are Gura's beliefs and how she views life itself.
And if you look at the article that Gura read, it represents optimistic nihilism with how life is meaningless and everything will fade into nothing. So Gura herself is a nihilist, which doesn't believe in a God or life having meaning but you should still have fun since life is so short.
Here's the proof
https://streamable.com/5xfiis 